| 单词 | gamma ray |
| 例句 | “Well, just for fun—suppose I ask the robots from now on a few questions on gamma rays. Wave length limits, for instance.” I, Robot 1950-12-02T00:00:00Z In order to observe a primordial black hole one would have to detect several gamma ray quanta coming from the same direction within a reasonable space of time, such as a week. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The next question came in a friendly, offhand manner, “Ever work with gamma rays?” I, Robot 1950-12-02T00:00:00Z Moreover, the detector would have to be in space, because gamma rays cannot penetrate the atmosphere. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z We do observe such a background of gamma rays: Fig. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Ice cubes don’t wipe out civilizations with bursts of gamma rays, though following the then-accepted rules of physics led inexorably to that conclusion. Zero: The Biography of a Dangerous Idea 2000-02-07T00:00:00Z And to observe these few coming from the distance of Pluto would require a larger gamma ray detector than any that have been constructed so far. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z So we warned every robot in advance that gamma rays would kill them, which it would, and we further warned them all that gamma rays would be between them and myself. I, Robot 1950-12-02T00:00:00Z In fact bursts of gamma rays from space have been detected by satellites originally constructed to look for violations of the Test Ban Treaty. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Even shorter wavelengths are known as ultraviolet, X rays, and gamma rays. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z They have no compulsion to prevent one coming to harm through an extraneous agency such as gamma rays. I, Robot 1950-12-02T00:00:00Z The sensitive counter clicks when exposed to gamma rays or to such high-energy charged particles as protons and helium nuclei. Cosmos 1980-01-01T00:00:00Z Then, slowly, “But, sir, if the gamma rays are between myself and the master that may be harmed, how can I save him? I would be destroying myself to no purpose.” I, Robot 1950-12-02T00:00:00Z We could look for the gamma rays that the primordial black holes emit during most of their lifetime. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z I would very much like this to be the case but I have to recognize that there are other possible explanations for the gamma ray bursts, such as colliding neutron stars. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z But despite the close agreement in position Helfand and Long do not insist that the gamma ray outburst is associated with the supernova remnant. Cosmos 1980-01-01T00:00:00Z “Mm-m. Well, boy, gamma rays will kill you instantly. They’ll destroy your brain. That is a fact you must know and remember. Naturally, you don’t want to destroy yourself.” I, Robot 1950-12-02T00:00:00Z Beyond the ultraviolet is the X-ray part of the spectrum, and beyond the X- rays are the gamma rays. Cosmos 1980-01-01T00:00:00Z New observations in the next few years, particularly by gravitational wave detectors like LIGO, should enable us to discover the origin of the gamma ray bursts. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z “Unfortunately, between the man and yourself, there will be a gamma ray field.” I, Robot 1950-12-02T00:00:00Z These X rays and gamma rays are like waves of light, but with a much shorter wavelength. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z And then I imagine I can feel the X rays and the gamma rays, feel them pinging on my eyelids, shooting through my skull, making the palms of my hands tingle like they've fallen asleep. Things Not Seen 2002-01-01T00:00:00Z They went right on through us as if they were gamma rays. Stargirl 2000-08-08T00:00:00Z They provided precise ionization data, spelled out their theory on how positrons emitted by the bombarded atoms transmuted into gamma rays, and carefully avoided any speculation about the significance of the new phenomenon. Big Science 2015-07-07T00:00:00Z “We got some replacements, but mostly it was a job of indoctrination. Anyway, the people who make them want to figure out robots that aren’t hit so bad by gamma rays.” I, Robot 1950-12-02T00:00:00Z From gamma rays to radio waves, all are equally respectable bands of light. Cosmos 1980-01-01T00:00:00Z Primordial black holes with initial masses less than this figure would already have completely evaporated, but those with slightly greater masses would still be emitting radiation in the form of X rays and gamma rays. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z This involved bombarding samples with neutrons in a small nuclear reactor and carefully counting the gamma rays that were emitted; it was extremely finicky work. A Short History of Nearly Everything 2003-05-06T00:00:00Z With primordial black holes being so scarce, it might seem unlikely that there would be one near enough for us to observe as an individual source of gamma rays. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z Radio-sodium had a gratifyingly lengthy half-life of fifteen and a half hours and gamma ray energies that Ernest calculated at about 5 million electron volts. Big Science 2015-07-07T00:00:00Z Some scientists have suggested that it was caused by a piece of hurtling antimatter, annihilated on contact with the ordinary matter of the Earth, disappearing in a flash of gamma rays. Cosmos 1980-01-01T00:00:00Z The gamma rays that bounced back were strong enough for Mr. Smither to collect and read. Leonardo Mural in Florence May Be Revealed 2011-08-26T23:53:05Z But there can also be intense bursts of gamma rays – extremely high-energy radiation – from the heart of a storm. What goes on when lightning strikes? 2013-05-25T23:07:12Z Doubtless there are those who will object that climate change, nuclear war, gamma ray bursts and pandemics aren’t subjects to joke about. That’s All, Folks: A Serious Joke Book About Climate Change 2022-05-13T04:00:00Z Visitors are challenged in virtual exercises to find gamma rays, calculate the engine power needed for air cargo drops, build bridges and diagnose illnesses. New Army Museum highlights innovation and individual stories 2020-11-10T05:00:00Z The signature of positrons has been detected by the Fermi Gamma-ray telescope above storms and the annihilation of this antimatter with normal matter builds the intensity of the gamma ray flashes. What goes on when lightning strikes? 2013-05-25T23:07:12Z It’s clear that we are not watching an isolated insomniac episode but a regular ritual: He is kept up at night, he says, with “always the hope gamma rays will merge our essence.” Review: Up All Night, With Rebecca Hall as Muse, in ‘Soundstage’ 2018-09-20T04:00:00Z A specialist in gamma rays, she spoke to Burgess about being an “archaeologist of space.” ‘We Choose to Go to the Moon’: Kennedy dream inspires a dance 2015-09-11T04:00:00Z Optical, radio, X-ray and gamma ray telescopes on mountaintops and in space, underground neutrino detectors and gravitational-wave observatories extend our sight to the edges of the universe. This Is How It All Ends 2020-08-04T04:00:00Z Recently, the IceCube team signed an agreement with the Nasa scientists who operate the Swift satellite that scours space for gamma ray bursts, the most violent events in the universe. The hunt for neutrinos in the Antarctic 2011-01-23T00:05:49Z Transforming into a superhero usually requires a radioactive insect bite, surviving deadly exposure to gamma rays, or being lucky enough to be born into a species with extraordinary powers. Oscar Wao Takes His Superpowers to the Stage 2019-10-22T04:00:00Z In principle, passengers in a nearby aircraft could receive the equivalent of 100 chest x-rays from a single gamma ray flash, though commercial pilots routinely avoid large thunderclouds. What goes on when lightning strikes? 2013-05-25T23:07:12Z But an intense blast of gamma rays from a nearby GRB would create nitrogen oxides that destroy ozone faster than it can regenerate. Cosmic blast seared Earth’s atmosphere from 2 billion light-years away 2023-11-14T05:00:00Z Such events are known as gamma ray bursts, and astronomers who have continued studying this one said it was the “brightest of all time.” A Supernova ‘Destroyed’ Some of Earth’s Ozone for a Few Minutes in 2022 2023-11-14T05:00:00Z These dead stars emanate rotating beams of electromagnetic radiation called gamma rays like a lighthouse, which we can observe from our vantage point on Earth as a light flashing on and off. Vera pulsar pouring out 200 times more energy than thought possible, scientists discover 2023-10-05T04:00:00Z Scientists using the H.E.S.S. observatory in Namibia have detected the highest energy gamma rays ever from a dead star called a pulsar. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z The emitted neutron and gamma ray energy and angular spectra are measured along with the probability for the reaction to occur, typically referred to as the neutron scattering cross section. Chi-Nu experiment ends with data to support nuclear security, energy reactors 2023-09-28T04:00:00Z Exposure to the gamma rays emitted by radium poses a radiological hazard, however, which very likely caused Sochocky's own death at age 45. Will "godlike AI" kill us all — or unlock the secrets of the universe? Probably not 2023-08-12T04:00:00Z Only their gamma ray, neutrino and antimatter emissions would reveal their existence, as might perhaps the presence of cold molecular hydrogen gas. Dark matter power: James Webb telescope may have proven the existence of dark stars 2023-07-16T04:00:00Z "We've seen it in many wavelengths of light - like radio waves and gamma rays - but since the dawn of time it was always in electromagnetic radiation. In all wavelengths of light or photons." Milky Way: Icy observatory reveals 'ghost particles' 2023-06-29T04:00:00Z The energy of these gamma rays clocked in at 20 tera-electronvolts, or about ten trillion times the energy of visible light. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z Many cosmic rays are in fact extremely high-energy photons—gamma rays—that can be absorbed by interstellar or intergalactic matter as they travel through space. In a First, Scientists See Neutrinos Emitted by the Milky Way 2023-06-29T04:00:00Z There appears to be some correlation between neutrinos and gamma rays, the highest energy form of light. Neutrinos Build a Ghostly Map of the Milky Way 2023-06-29T04:00:00Z Another is a gamma ray spectrometer, which like a Geiger counter can capture the radiation emitted by thorium, uranium, and potassium. Major U.S. geological survey aims to uncover minerals critical for batteries and microchips 2023-06-01T04:00:00Z It captured images in high-energy X-rays and gamma rays, recording more than 100,000 solar events. Old NASA satellite falling to Earth, risk of danger ‘low’ 2023-04-18T04:00:00Z This observation is hard to reconcile with the theory of the production of such pulsed gamma rays, as the international team reports in the journal Nature Astronomy. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z A solar storm or gamma ray assault on the scale of the 774–75 C.E. event would similarly turn the night sky into an awe-provoking swirl of crackling, shimmering light. Marking time: Cosmic ray storms can pin precise dates on history from ancient Egypt to the Vikings 2023-04-13T04:00:00Z The showering of cosmic rays, gamma rays and neutrinos on Earth shows the universe is anything but calm, with exploding stars, and black holes swallowing their surroundings. Neutrinos Build a Ghostly Map of the Milky Way 2023-06-29T04:00:00Z Scientists have revealed how Nasa satellites detected the brightest ever gamma ray explosion in space. Space scientists reveal brightest gamma explosion ever 2023-03-28T04:00:00Z As the isotopes destabilize, they emit gamma rays which can be measured with a high-resolution gamma spectrometer. The unsolved mystery of the president who may have been assassinated with arsenic 2023-03-05T05:00:00Z Whatever the explanation, next to its other superlatives, the Vela pulsar now officially holds the record as the pulsar with the highest-energy gamma rays discovered to date. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z "It emits both beta rays and gamma rays so if you have it close to you, you could either end up with skin damage including skin burns," the state's Chief Health Officer Andy Robertson warned. How a tiny radioactive capsule was found in Australia's vast outback 2023-02-01T05:00:00Z Sophisticated telescopes have surveyed the Milky Way across the spectrum of light, from radio waves to ultra-high-energy gamma rays. Neutrinos Build a Ghostly Map of the Milky Way 2023-06-29T04:00:00Z “We’re using the radiation detectors to locate the gamma rays,” he said. Tiny radioactive capsule lost in Australia triggers search 2023-01-28T05:00:00Z “We are using the radiation detectors to locate the gamma rays, using the meters, that will help us then locate the small device.” Australians Scour Desert for Dangerous Radioactive Capsule Smaller Than a Penny 2023-01-28T05:00:00Z Some people suggested a connection between neutron star collisions and gamma-ray bursts—highly energetic explosions in space that emit a flash of gamma rays. How Star Collisions Forge the Universe’s Heaviest Elements 2023-01-09T05:00:00Z A bright flash of gamma rays from the constellation Boötes that lasted nearly one minute came from a kilonova, as we described in a new paper. An unusual, long-lasting gamma-ray burst challenges theories about how they work 2023-01-01T05:00:00Z One intriguing theory is that millions of years ago, an exploding star light-years away pummeled Earth with cosmic radiation in the form of X-rays, gamma rays and ultraviolet rays. Climbing trees helped our ancestors evolve to walk on two legs rather than four, study suggests 2022-12-23T05:00:00Z The explosions send short, intense jets of ultra-high-energy photons known as gamma rays traveling across the universe. Why Some Scientists Choose China’s Space Station for Research 2022-12-12T05:00:00Z These include a four-nation experiment on gamma ray bursts and a pair of infrared cameras to study Earth’s humidity flows. News at a glance: Earth’s top geological sites, cameras on sharks, and China’s space station 2022-11-02T04:00:00Z If the beam happens to be pointed your way, you see a flash of gamma rays bright enough to be detected even from many billions of light-years distant. The Brightest Gamma-Ray Burst Ever Recorded Rattled Earth’s Atmosphere 2022-10-21T04:00:00Z When astronomers pointed other telescopes at the part of the sky where this large blast of gamma rays – named GRB211211A – came from, they saw a glow of visible and infrared light known as a kilonova. An unusual, long-lasting gamma-ray burst challenges theories about how they work 2023-01-01T05:00:00Z Outer space is full of gamma rays, though few make it all the way to Earth's surface, as the atmosphere absorbs the vast majority before they can ever make it down to hurt us. Earth just got zapped by the biggest gamma-ray burst of all time 2022-10-18T04:00:00Z The experiment examines whether gamma rays from a gamma-ray burst line up in a particular way. Why Some Scientists Choose China’s Space Station for Research 2022-12-12T05:00:00Z But electromagnetic waves come in all sizes, from the shortest wavelengths, and the highest frequencies — powerful gamma rays and X-rays — through ultraviolet, visible, infrared, microwaves and, finally, low-frequency radio waves. Maarten Schmidt, Caltech astronomer who changed our understanding of the cosmos, dies 2022-09-23T04:00:00Z However, even for a long-duration burst it was unusually extended, and another blast of gamma rays was spotted by the Neil Gehrels Swift Observatory, another orbiting set of telescopes designed to observe bursts. The Brightest Gamma-Ray Burst Ever Recorded Rattled Earth’s Atmosphere 2022-10-21T04:00:00Z In moments after the black hole starts emitting this high-energy stream of matter and radiation, the jet produces a burst of gamma rays that can last for minutes. An unusual, long-lasting gamma-ray burst challenges theories about how they work 2023-01-01T05:00:00Z Different names are used for electromagnetic waves of different wavelengths: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. College Physics for AP Courses 2015-08-12T00:00:00Z The most common are protons, neutrons, alpha particles, beta particles, positrons, and gamma rays, as shown in Figure 21.4. Chemistry 2019-02-14T00:00:00Z Energetic gamma rays are emitted when these radioactive nuclei decay. Astronomy 2016-10-13T00:00:00Z Doctors can tune beams of protons to precisely destroy specific targets, usually cancerous tumors, without harming nearby organs—unlike x-rays and gamma rays, which have historically been the go-to beams for cancer therapy. Physics Particles Fly as Practical Tools 2022-07-29T04:00:00Z But the long-lasting burst of gamma rays throws doubt on what exactly happened. An unusual, long-lasting gamma-ray burst challenges theories about how they work 2023-01-01T05:00:00Z Other times it is subtle, such as the unfelt energy of gamma rays, which can destroy living cells. College Physics for AP Courses 2015-08-12T00:00:00Z For example, when a positron and an electron collide, both are annihilated and two gamma ray photons are created: Chemistry 2019-02-14T00:00:00Z The satellites did not detect any confirmed events from human activities, but they did—to everyone’s surprise—detect short bursts of gamma rays coming from random directions in the sky. Astronomy 2016-10-13T00:00:00Z A gamma ray spectrometer will provide more information on the distribution of elements on the lunar surface. With lunar orbiter, South Korea will join a revived race to explore the Moon 2022-07-28T04:00:00Z Comparing the size and timing of the flashes, researchers can distinguish recoiling nuclei from, say, recoiling electrons, which can be generated by gamma rays hitting the detector. Dark matter hunt heats up with first result from world’s biggest detector 2022-07-06T04:00:00Z In an experiment in which the Compton effect is observed, a “gamma ray” photon with a wavelength of 5.00 × 10–13 m scatters from an electron. College Physics for AP Courses 2015-08-12T00:00:00Z Flaws in metals used for structural purposes can be detected using high-energy gamma rays from cobalt-60 in a fashion similar to the way X-rays are used to examine the human body. Chemistry 2019-02-14T00:00:00Z No one knew what produced the brief flashes of gamma rays or how far away the sources were. Astronomy 2016-10-13T00:00:00Z The team also found—somewhat unsurprisingly—that most gamma rays from dark matter in these voids should emerge via the decay of the particles rather than their annihilation. Astronomers Might See Dark Matter by Staring into the Void 2022-06-08T04:00:00Z "You can compare a gamma ray from a nuclear reactor with a bullet flying from a gun," he said. As Russia attacks Ukraine, experts weigh European "renaissance" for nuclear energy 2022-04-10T04:00:00Z Their lowest frequencies overlap the ultraviolet range but extend to much higher values, overlapping at the high end with gamma rays. College Physics for AP Courses 2015-08-12T00:00:00Z Due to the much larger energy differences between nuclear energy shells, gamma rays emanating from a nucleus have energies that are typically millions of times larger than electromagnetic radiation emanating from electronic transitions. Chemistry 2019-02-14T00:00:00Z Two giant bubbles that extend 25,000 light-years above and below the galactic center are emitting gamma rays. Astronomy 2016-10-13T00:00:00Z Pulsars emit gamma rays, in addition to their flood of radio waves. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z Water pumped into the basins cools the fuel and blocks radioactive gamma rays that emanate from the irradiated uranium. Perspective | One thing nuclear power plants weren’t built to survive: War 2022-03-18T04:00:00Z The gamma rays emitted by cesium and cobalt can kill germs multiplying in your meat and make your apples last longer. Radioactive Material Is Basically Everywhere and That’s a Problem 2022-03-11T05:00:00Z The properties of pure PbI2 crystals make them useful for fabrication of X-ray and gamma ray detectors. Chemistry 2019-02-14T00:00:00Z Those gamma rays then serve as a new source of energy for the expanding layers of the supernova. Astronomy 2016-10-13T00:00:00Z They searched through 12.5 years of Fermi’s archive for gamma ray photons from about 30 suitable pulsars. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z A troubled €300 million nuclear physics research facility in Romania may now have to do without one of its main components, a gamma ray beam designed to probe the heart of atoms. European laser project rocked by potential loss of gamma ray beam 2022-03-01T05:00:00Z An electromagnetic pulse is produced by gamma rays from a nuclear blast or from special electronic weapons and can disrupt or destroy all electronic devices over wide areas. Threat of EMP attack reenforced by loss of SpaceX satellites to geomagnetic storm 2022-02-09T05:00:00Z Types of radiation differ in their ability to penetrate material and damage tissue, with alpha particles the least penetrating but potentially most damaging and gamma rays the most penetrating. Chemistry 2019-02-14T00:00:00Z Some gamma rays also escaped directly without being absorbed. Astronomy 2016-10-13T00:00:00Z Still, the team reports today in Science, their trawl through the Fermi archive turned up enough photons to make a gamma ray PTA. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z That’s because the U.S. company contracted to supply the gamma ray source may be on the verge of bankruptcy, according to sources familiar with the situation. European laser project rocked by potential loss of gamma ray beam 2022-03-01T05:00:00Z Well before the pandemic, there were alpha particles and gamma rays. With coronavirus variants, world gets crash course on the Greek alphabet 2021-12-14T05:00:00Z The airburst bombs of Hiroshima and Nagasaki had killed by blast, heat and “prompt radiation”: gamma ray bursts that disrupt the body’s ability to replace red and white blood cells. Review | Experimenting with hydrogen bombs, the U.S. blew lives apart 2021-11-03T04:00:00Z Which is more dangerous to living things, gamma rays or X-rays? Astronomy 2016-10-13T00:00:00Z “One very useful thing the gamma ray data can do is help us understand the effect of the interstellar medium,” which is a major source of noise in PTA searches, McLaughlin says. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z The center aims to study the structure of atomic nuclei and the quantum particles that pop in and out of empty space, using two 10-petawatt lasers alongside the world’s most intense gamma ray beam. European laser project rocked by potential loss of gamma ray beam 2022-03-01T05:00:00Z Scientists will use the $145 million Compton Spectrometer and Imager, to be launched in 2025, to study how stars forge elements, by tracking gamma rays from the decay of radioactive atoms produced in supernovae. News at a glance: Climate promises, a predatory ‘Hydra’ publisher, and tracking the birth of elements 2021-10-27T04:00:00Z Their own examinations suggest the chances of some bright entity close to Earth mimicking a gamma ray burst to be one in 1 trillion or less. ‘Distant cosmic explosion’ was actually Russian space junk, new studies argue 2021-10-04T04:00:00Z Astronomers want to make maps of the sky showing sources of X-rays or gamma rays. Astronomy 2016-10-13T00:00:00Z But gamma rays get a free pass, and by comparing pulsar signals from radio and gamma rays, researchers can better understand the interstellar noise, and potentially identify the fingerprint of gravitational waves. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z The Bucharest center originally contracted with EuroGammaS, a consortium of European research institutes and companies, to supply the gamma ray source. European laser project rocked by potential loss of gamma ray beam 2022-03-01T05:00:00Z EMP attacks use the gamma rays created in a high-altitude nuclear blast to disrupt all electronics over wide areas, a way to attack an enemy without causing the kinetic destruction of an above-ground explosion. Biden goes easy on China at U.N. 2021-09-22T04:00:00Z Last year, a team of astronomers made a blockbuster claim, saying they had captured the most distant cosmic explosion ever—a gamma ray burst in a galaxy called GN-z11. ‘Distant cosmic explosion’ was actually Russian space junk, new studies argue 2021-10-04T04:00:00Z Explain why those X-rays and gamma rays must be observed from above Earth’s atmosphere. Astronomy 2016-10-13T00:00:00Z Once the PTAs—radio and gamma ray—have identified the gravitational wave background, the next target will be individual supermassive black hole binaries to find out how these swirling behemoths affect the galaxies around them. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z But he was nevertheless confident the company could install the gamma ray source by early 2023, as stipulated in the contract. European laser project rocked by potential loss of gamma ray beam 2022-03-01T05:00:00Z Erupting from hundreds of light-years away, the flash of x-rays and gamma rays probably did no harm on Earth. Exploding stars may have assaulted ancient Earth 2021-07-15T04:00:00Z Using CalSky.com, a web-based tool for determining the positions of objects in the sky, Jiang’s team believes the Russian rocket actually passed outside of the Keck’s view at the time of the debated gamma ray observation. ‘Distant cosmic explosion’ was actually Russian space junk, new studies argue 2021-10-04T04:00:00Z So, the sunlight given off by the Sun today had its origin as a gamma ray produced by nuclear reactions deep in the Sun’s core. Astronomy 2016-10-13T00:00:00Z Discovering that Fermi could do this “was a big surprise for us,” says team leader Matthew Kerr, a gamma ray astronomer at the Naval Research Laboratory. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z A third source says the company sent home employees working on the gamma ray beam at the beginning of February and those people had yet to return to work. European laser project rocked by potential loss of gamma ray beam 2022-03-01T05:00:00Z Writing in Astrophysical Journal Letters, they concluded that the most energetic, potentially damaging photons—x-rays or gamma rays—would have minimal impact. Exploding stars may have assaulted ancient Earth 2021-07-15T04:00:00Z Plans call for using the telescope to probe galaxy formation and hunt for exoplanets, and training it on transient sources such as gamma ray bursts to try to pinpoint their locations. Iranian astronomers fear their ambitious observatory could become a ‘Third World telescope’ 2021-07-12T04:00:00Z So far, our discussion has assumed that the source of the gamma rays gives off the same amount of energy in all directions, like an incandescent light bulb. Astronomy 2016-10-13T00:00:00Z Scientists have long known the Crab Nebula as a very energetic astrophysical object beaming off radiation ranging from radio waves to gamma rays. Highest-Energy Particles Yet Arrive from Ancient Crab Nebula 2021-07-08T04:00:00Z Resembling airport metal detectors, RPMs detect neutrons and gamma rays emitted by radioactive substances. New type of imager could help spot smuggled nuclear materials 2021-05-19T04:00:00Z EuroGammaS, a consortium of public research institutes and industry, delivered much of the gamma ray source to ELI-NP in 2018 but said the lab floor was uneven and refused to install the components. Romania left out of high-powered laser project 2021-05-19T04:00:00Z Follow-up observations with gamma ray and optical telescopes of the resulting kilonova revealed the spectral signature of large quantities of r-process elements in the blast debris. Trace seabed plutonium points to stellar forges of heavy elements 2021-05-13T04:00:00Z On May 9, 2005, Swift detected a flash of gamma rays lasting 0.13 seconds in duration, originating from the constellation Coma Berenices. Astronomy 2016-10-13T00:00:00Z The largest is the Square Kilometer Array, with some 6,000 aboveground counters and more than 1,100 subsurface muon detectors to catch cosmic rays and gamma rays. Highest-Energy Particles Yet Arrive from Ancient Crab Nebula 2021-07-08T04:00:00Z The new technique relies on detectors that emit light when struck by either a neutron or a gamma ray and measure the time of arrival with nanosecond precision. New type of imager could help spot smuggled nuclear materials 2021-05-19T04:00:00Z In 1979, a messenger arrived from deep space: Satellites detected a mysteriously short and powerful flash of gamma rays, the highest energy form of light. How highly magnetized neutron stars set off powerful cosmic explosions 2021-04-23T04:00:00Z On 15 April 2020, a wave of gamma rays, nature’s most powerful kind of light, washed across the Solar System like a storm front. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z However, we have access to a wide spectrum of electromagnetic radiation, ranging from the longest- wavelength radio waves to the shortest-wavelength gamma rays. Astronomy 2016-10-13T00:00:00Z They focused on the gamma rays released after nuclear fission, which encoded information on the spin of the resulting fragments. Mystery of Spinning Atomic Fragments Solved at Last 2021-02-24T05:00:00Z Suppose two detectors sit face to face, separated by 1 meter or so, and that a nucleus decays and emits a neutron that hits one detector and a gamma ray that hits the other. New type of imager could help spot smuggled nuclear materials 2021-05-19T04:00:00Z Also, Swift and Fermi are optimized to capture the longer, higher energy gamma ray bursts that hail from the collapse of massive stars. China launches gamma ray–hunting satellites to trace sources of gravitational waves 2020-12-10T05:00:00Z By the 1970s, after these gamma ray bursts were declassified, astrophysicists on both sides of the Iron Curtain tried to identify their cosmic sources. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z The name gamma comes from the third letter of the Greek alphabet: gamma rays were the third kind of radiation discovered coming from radioactive atoms when physicists first investigated their behavior. Astronomy 2016-10-13T00:00:00Z In the next couple of days there were reports of similarities between this event and gamma-ray bursts, yet there had been no detected show of gamma rays. Strange Supernovae Upend Expectations 2020-11-17T05:00:00Z Those experiments involve blasting atomic nuclei with a particle beam that knocks off neutrons, leaving energetically excited nuclei that radiate gamma rays. New type of imager could help spot smuggled nuclear materials 2021-05-19T04:00:00Z GECAM’s observational energy range extends down to 6 kiloelectronvolts, lower than Swift and Fermi, which may be an advantage spotting the “softer” gamma ray bursts associated with gravitational waves, Xiong says. China launches gamma ray–hunting satellites to trace sources of gravitational waves 2020-12-10T05:00:00Z A split-second pulse of gamma rays 100 times brighter than any gamma ray burst yet seen blazed across the Soviet and U.S. spacecraft. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z The electromagnetic spectrum consists of gamma rays, X-rays, ultraviolet radiation, visible light, infrared, and radio radiation. Astronomy 2016-10-13T00:00:00Z Either way, this “central engine” pumps out energy that gets funneled into a jet of extremely hot plasma that tunnels from the center of the star out through the infalling material, glowing in gamma rays. Strange Supernovae Upend Expectations 2020-11-17T05:00:00Z For one thing, astronomers continued to monitor the magnetar as it burped up more X-rays and gamma rays, but those follow-up events didn’t match up with any significant radio wave bursts. Astronomers trace mysterious space radio waves to a source within our galaxy 2020-11-04T05:00:00Z From these perches they will watch for the gamma ray bursts that emanate from the merger of ultradense objects, events that also generate gravitational waves, ripples in space-time. China launches gamma ray–hunting satellites to trace sources of gravitational waves 2020-12-10T05:00:00Z Aftershocks of the burst persisted for a few minutes, repeating every 8 seconds, as if the gamma rays were beaming from a specific spot on a compact, spinning object. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z This gamma ray, which has been created in the center of the Sun, finds itself in a world crammed full of fast-moving nuclei and electrons. Astronomy 2016-10-13T00:00:00Z The result was a unique and multidimensional look — based on radio emissions, X-rays and gamma rays as well as old-fashioned visible light observations — at the complexities of death by black hole. A Black Hole’s Lunch: Stellar Spaghetti 2020-10-17T04:00:00Z “We have gamma rays here,” she said, “so I was like, ‘What if it’s that?’” Tiny rural county only one in Nevada with no COVID-19 cases 2020-10-24T04:00:00Z “Most theorists think the answer is no, but more and more people believe that in some circumstances it may produce electromagnetic emissions, including gamma ray bursts,” he says. China launches gamma ray–hunting satellites to trace sources of gravitational waves 2020-12-10T05:00:00Z But to get a gamma ray burst like the one in 1979 required an even more magnetic object. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z The gamma ray collides with particles of matter and transfers its energy to one of them. Astronomy 2016-10-13T00:00:00Z They looked for excess x-ray and gamma ray emissions from protons in the germanium nuclei, which create electrical pulses in the material. One of quantum physics’ greatest paradoxes may have lost its leading explanation 2020-09-07T04:00:00Z Unlike black hole mergers, this kind of collision, a splat between two ultradense stars, yields a pulse of optical light, x-rays and gamma rays. How Astronomers Revolutionized Our View of the Cosmos 2020-09-01T04:00:00Z Working together, the two satellites can monitor the whole sky, tracing the source of a gamma ray burst to a particular location. China launches gamma ray–hunting satellites to trace sources of gravitational waves 2020-12-10T05:00:00Z Electrons in the plasma would collide with the photons, nudging them up to gamma ray strength. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z Because gamma rays carry a lot of energy, they can be dangerous for living tissues. Astronomy 2016-10-13T00:00:00Z Within a fraction of a microsecond, the electron and the positron collide and annihilate each other in a flash of gamma rays. Tantalizing oddity found in exotic atom—but physicists aren’t hyping it 2020-08-25T04:00:00Z The team discovered what they called a “heartbeat” of gamma rays emanating from a gas cloud in the constellation Aquilla. A Rip in the Fabric of Interstellar Dreams 2020-08-21T04:00:00Z Citizens farthest from the epicenter were more likely to survive, but still suffered from the effects of neutron and gamma rays from the fireball. For 90-year-old Hiroshima survivor Kiyoko Neumiller, every day is another opportunity for peace 2020-08-23T04:00:00Z If beams like that ever swept across Earth, well—they might just explain these misfit gamma ray bursts. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z In the twentieth century, our exploration of space made it possible to detect electromagnetic radiation at all wavelengths, from gamma rays to radio waves. Astronomy 2016-10-13T00:00:00Z These are on the opposite end of the electromagnetic spectrum to ionizing radiation sources like X-rays, gamma rays, and ultraviolet rays. Why the 5G coronavirus conspiracy theories don’t make sense 2020-04-09T04:00:00Z A new study closely analyzed the pattern of the gamma rays in terms of both their spatial spread and their energy. Milky Way Dark Matter Signals in Doubt after Controversial New Papers 2020-03-26T04:00:00Z Later scientists observed this so-called Hoyle state and confirmed that the carbon then emitted gamma rays to de-excite down to its ground, or stable, state. Carbon Conundrum: Experiment Aims to Re-create Synthesis of Key Element 2020-03-19T04:00:00Z Yet another instrument, also on Fermi, caught a few gamma rays at even higher energies starting 19 seconds after the main event. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z One major challenge is to design “mirrors” to reflect such penetrating radiation as X-rays and gamma rays, which normally pass straight through matter. Astronomy 2016-10-13T00:00:00Z Experts said there’s a normal explanation for the puppy’s coloration — and no, he wasn’t exposed to any gamma rays. Not easy being green: North Carolina dog births unique puppy 2020-01-16T05:00:00Z On 14 January, the initial flash of a gamma ray burst was detected by a Nasa space telescope, which within seconds sent an alert to more powerful ground-based instruments. Big star energy: record-breaking explosion recorded 2019-11-20T05:00:00Z The lyrics show a preoccupation with outer space, with references to a falling star, the moon, the sun, gamma rays and the stratosphere. Review: Beck shoots into the galaxy for latest trippy album 2019-11-19T05:00:00Z For Eric Burns, an astronomer at Louisiana State University, Baton Rouge, the flare offered a chance to search for similar events in the gamma ray back catalog. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z List the largest-aperture single telescope currently in use in each of the following bands of the electromagnetic spectrum: radio, X-ray, gamma ray. Astronomy 2016-10-13T00:00:00Z And theory generally suggests that, rarely, when two dark matter particles collide they should annihilate each other to produce ordinary particles, such as the observed high energy photons, or gamma rays. Physicists revive hunt for dark matter in the heart of the Milky Way 2019-11-12T05:00:00Z They’ll be looking in particular for groups of sporadic gamma ray flashes that would move slowly across the sky, as Planet Nine would be expected to do as seen from Earth. ‘Planet Nine’ may actually be a black hole 2019-09-27T04:00:00Z If we saw just gamma rays—the highest-energy form of light—released by the moon, it would lose its monthly cycle. Flashing Neurons, Invisible Moonlight and Adorable Squid Babies: The Week’s Best Science GIFs 2019-08-23T04:00:00Z Furthermore, the rates imply that at least several percent of previously observed short gamma ray bursts are actually masquerading giant flares, too. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z Imagine the uproar if the entire populations of York, Portsmouth or Swindon were suddenly exposed to three times the permissible level of penetrating gamma radiation, or what the nuclear physicist Ernest Rutherford termed gamma rays. The nuclear arms race is back … and ever more dangerous now 2019-08-17T04:00:00Z The digital image of the glow consists of about 12,000 pixels, each containing a handful of gamma ray photons, with the number varying from pixel to pixel. Physicists revive hunt for dark matter in the heart of the Milky Way 2019-11-12T05:00:00Z The resulting gamma rays could fuel a fusion reaction that then propels the spacecraft. The Good Kind of Crazy: The Quest for Exotic Propulsion 2019-07-29T04:00:00Z They have surveyed the sky in infrared, UV, x-ray and gamma ray bands that don’t penetrate the atmosphere and therefore can’t be observed from the ground. The moon was once a frontier. But new worlds now beckon | Martin Rees 2019-07-20T04:00:00Z Hurley is still wrangling gamma ray sensors across the Solar System—and space agencies. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z According to Hamilton, the standard protocol for taking external gamma ray measurements is to hold a hand-held device about 1 meter above the ground. Radioactivity in parts of the Marshall Islands is far higher than Chernobyl, study says 2019-07-15T04:00:00Z Trump radiates insecurity much like the Chernobyl reactor scatters gamma rays: obviously and without regard to anyone’s safety. Trump's spat with the UK reveals the bottomless depths of his insecurities | Richard Wolffe 2019-07-09T04:00:00Z When gamma rays strike Earth’s atmosphere they create air showers—spreading cascades of electrons and other subatomic particles. Highest energy light ever seen traced to Crab Nebula 2019-07-08T04:00:00Z Pentaquarks should occasionally form when protons are bombarded with gamma ray photons, as physicists at Thomas Jefferson National Accelerator Facility in Newport News, Virginia, are trying to do. Exotic particles called pentaquarks may be less weird than previously thought 2019-06-05T04:00:00Z When gamma rays strike the atmosphere, they create a cascade of secondary particles spreading in a cone until they hit the ground. China’s ambitious telescopes rise in the thin air of the Tibetan Plateau 2019-04-25T04:00:00Z On March 28, 2011, astronomers detected a long gamma ray burst coming from the center of a galaxy 4 billion light-years away. What Is a Black Hole? Here’s Our Guide for Earthlings 2019-04-10T04:00:00Z The word “radiation” makes you think of gamma rays, which sound terrifying. Should we be worried? The truth about everyday fears 2019-03-17T04:00:00Z As these particles hit the detectors, the timing and energy of the strikes are recorded—enabling astronomers to reconstruct the energy and trajectory of the original gamma ray. Highest energy light ever seen traced to Crab Nebula 2019-07-08T04:00:00Z If and when WIMPs collide with each other somewhere in the cosmos, they should annihilate in a burst of energy that emits gamma rays. New Star Maps Shed Light on Milky Way's Convulsive History 2019-01-28T05:00:00Z An additional 1170 buried detectors will look for particles called muons, which can help discriminate between gamma ray showers and showers caused by cosmic rays, charged particles that can also reach extraordinary energies. China’s ambitious telescopes rise in the thin air of the Tibetan Plateau 2019-04-25T04:00:00Z So far, scientists have detected black holes only indirectly, by their signatures, such as a gamma ray burst, supernova or, perhaps, an object on the brink of a black hole’s event horizon. What Is a Black Hole? Here’s Our Guide for Earthlings 2019-04-10T04:00:00Z Scintillation crystals capture the energies of gamma rays. It’s Intermission for the Large Hadron Collider 2018-12-21T05:00:00Z Fortunately, the air showers sparked by cosmic rays contain a higher proportion of muons, short-lived cousins of the electrons, than the showers from gamma rays. Highest energy light ever seen traced to Crab Nebula 2019-07-08T04:00:00Z Among other activities, the lab set suggested "playing hide and seek with the gamma ray source", challenging players to a game using a Geiger counter to locate a radioactive sample hidden in a room. Most wanted? Christmas gifts from years ago 2018-12-23T05:00:00Z Unlike cosmic rays, the paths of gamma rays are unaffected by magnetic fields, making it possible to trace them back to their distant sources. China’s ambitious telescopes rise in the thin air of the Tibetan Plateau 2019-04-25T04:00:00Z On July 2, 1967, a network of satellites recorded an explosion of gamma rays coming from outer space. What Is a Black Hole? Here’s Our Guide for Earthlings 2019-04-10T04:00:00Z Water, light and temperature are automatically controlled, the product sterilized with gamma rays. Canada’s artisanal pot growers face rising corporate tide 2018-12-07T05:00:00Z The strikes shatter the previous record holder: 75 TeV gamma rays observed by the High Energy Gamma Ray Astronomy experiment located on La Palma, one of Spain's Canary Islands. Highest energy light ever seen traced to Crab Nebula 2019-07-08T04:00:00Z For astronomers, that collision was even more of a gold mine because it produced a gamma ray burst and other electromagnetic signals that, for example, revealed the birth of copious heavy nuclei. Cosmic cacophony of colliding black holes continues 2018-12-03T05:00:00Z Thousands of cheaper detectors spaced out across the 1.3-kilometer site will watch for higher energy gamma rays. China’s ambitious telescopes rise in the thin air of the Tibetan Plateau 2019-04-25T04:00:00Z Today, scientists believe that a gamma ray burst is the final breath of a dying star and the birth of a stellar-mass black hole. What Is a Black Hole? Here’s Our Guide for Earthlings 2019-04-10T04:00:00Z So Ajello and the team measured starlight by proxy, with the help of gamma rays. Astrophysicists count all the starlight in the universe 2018-11-29T05:00:00Z He believes supermassive black holes that sit at the centers of galaxies might prove to be another source of high energy gamma rays. Highest energy light ever seen traced to Crab Nebula 2019-07-08T04:00:00Z The latest observations, collected over nine years by Nasa’s Fermi space telescope, use the light from blazars – super-massive black holes that emit powerful jets of gamma rays – as beacons to illuminate the cosmic fog. Astronomers measure total starlight emitted over 13.7bn years 2018-11-29T05:00:00Z Analyzing the blazars’ gamma ray emissions, they found that some were blocked more effectively than others. Blazing quasars reveal the universe hit ‘peak star birth’ 3 million to 4 million years after the big bang 2018-11-29T05:00:00Z But to get a full picture of the energetic events happening, the researchers needed to look more broadly at the spectrum of electromagnetic energy, from radio waves to gamma rays. Holy Cow! Astronomers agog at mysterious new supernova 2018-11-01T04:00:00Z Blazars, or supermassive black holes at the centers of galaxies, emit gamma rays when matter near these black holes is shredded and flung away. Astrophysicists count all the starlight in the universe 2018-11-29T05:00:00Z "We would see extremely bright flashes of optical light, and there would be lots of high energy radiation, like gamma rays and X-rays, that would be very damaging to our bodies." 'Mind-boggling' monster black hole at Milky Way's center seen by scientists 2018-10-31T04:00:00Z Even at night, Earth’s atmosphere distorts light from space, making images blurry, and other signals — particularly gamma rays — impossible to see. As NASA’s prized telescopes falter, astronomers fear losing their eyes in space 2018-10-18T04:00:00Z She wound up with a “fantastic miscellany of jobs,” studying the universe in every conceivable wavelength of light: X-ray, gamma ray, radio wave, infrared. She made the discovery, but a man got the Nobel. A half-century later, she’s won a $3 million prize. 2018-09-08T04:00:00Z Unlike ionizing radiation such as X-rays or gamma rays, which are known to be strong enough to damage DNA, radiofrequency waves emitted by cellphones are much weaker, and health research has produced ambiguous findings. Wireless industry using First Amendment as a cudgel in its battle against safety warnings 2018-07-15T04:00:00Z The starlight is, essentially, “absorbing” the gamma rays, akin to the way gases in Earth’s atmosphere absorb light from the sun. Astrophysicists count all the starlight in the universe 2018-11-29T05:00:00Z This was a blazar, a galaxy with a supermassive black hole at the centre and a known source of gamma rays. Single subatomic particle illuminates mysterious origins of cosmic rays 2018-07-11T04:00:00Z A rendering of the blazar sending gamma rays and neutrinos to Earth. Astronomers trace the source of a high-energy particle that slammed into Earth 2018-07-12T04:00:00Z Instruments for the project recorded bursts of gamma ray flashes produced in the first milliseconds of cloud-to-ground lightning strikes, the Deseret News reported . Utah scientists look to uncover mystery of lightning 2018-06-03T04:00:00Z His gamma ray detector is used in nuclear research. Robert N. Hall, 96, whose inventions are everywhere, is dead 2018-05-11T04:00:00Z An especially powerful subset of supernovae, known as gamma ray bursts, are thought to be more important for destroying life in the universe, though these events are much rarer. Dark energy’s weakness may be why supernovae didn’t kill us all 2018-05-04T04:00:00Z But in a separate study, she and her collaborators found hints of a TXS flare during that period, but with gamma rays of energies that were mostly too high for Fermi-LAT to detect. Single subatomic particle illuminates mysterious origins of cosmic rays 2018-07-11T04:00:00Z The payload includes two cameras, which can capture 12 frames per second, plus X-ray and gamma ray detectors. Hunting mystery lightning from space 2018-04-06T04:00:00Z To their surprise, the researchers found the most intense gamma rays appear strangely synced with the quietest part of the solar cycle. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z Two seconds after the gravitational waves, orbiting telescopes detected a powerful, short gamma ray burst. Gravitational waves help reveal the weight limit for neutron stars, the densest objects in the cosmos 2018-02-15T05:00:00Z “When we heard about this paper, we took our detector and set it up next to our big tank and started looking for gamma rays.” Missing Neutrons May Lead a Secret Life as Dark Matter 2018-01-29T05:00:00Z Other photons from the laser beam would ricochet off the electrons and be boosted into high-energy gamma rays. Physicists are planning to build lasers so powerful they could rip apart empty space 2018-01-24T05:00:00Z “We were looking for it in X-rays, gamma rays, and there's nothing there,” Chatterjee said. Scientists zoom in on fast radio bursts, the most mysterious signals in space 2018-01-10T05:00:00Z But over the next eight years, as solar activity built to a peak and then regressed back toward quiescence, the sun emitted no high-energy gamma rays at all. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z The short gamma ray burst, the supposed birth cry of a black hole, indicates that the merged neutron star collapsed in seconds. Gravitational waves help reveal the weight limit for neutron stars, the densest objects in the cosmos 2018-02-15T05:00:00Z But gamma rays weren't the only thing the merger produced. Better Instruments Give Scientists a New Way to Study the Cosmos 2018-01-11T05:00:00Z The laser field would then shake the particles, causing them to emit electromagnetic waves—in this case, gamma rays. Physicists are planning to build lasers so powerful they could rip apart empty space 2018-01-24T05:00:00Z “We grow the plants, harvest them, dry and grind the leaves, sanitize the final product with gamma rays, then ship it to pharmacies and hospitals.” In Italy, the army provides medical marijuana. And some say that’s a problem. 2017-11-29T05:00:00Z Most likely the gamma rays are triggered by some aspect of the sun’s activity cycle, but the details remain unclear. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z Detection of high-energy gamma rays from winter thunderclouds. Photonuclear reactions triggered by lightning discharge 2017-11-21T05:00:00Z Next, thousands of scientists around the world mobilized to conduct a coordinated study of the merger's afterglow across the entire electromagnetic spectrum, the range of frequencies from gamma rays to visible light to radio waves. Better Instruments Give Scientists a New Way to Study the Cosmos 2018-01-11T05:00:00Z The gamma rays would, in turn, generate new electron-positron pairs, and so on, resulting in an avalanche of particles and radiation that could be detected. Physicists are planning to build lasers so powerful they could rip apart empty space 2018-01-24T05:00:00Z The bomb would be heavily “salted” with radioactive cobalt, which emits deadly gamma rays for years. Special Report: In modernizing nuclear arsenal, U.S. stokes new arms race 2017-11-21T05:00:00Z The team speculates these gamma rays are likely emitted when powerful cosmic rays—produced throughout the universe by violent astrophysical events like supernovae and colliding neutron stars—slam into the sun’s surface. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z Ground-level observation of a terrestrial gamma ray flash initiated by a triggered lightning. Photonuclear reactions triggered by lightning discharge 2017-11-21T05:00:00Z Observers can detect and record the flashes, using them to deduce the energies and cosmic origins of the gamma rays that triggered the particle cascades. Through a Gas, Darkly: Scientists Trace the Origins of Earth's Antimatter 2017-11-16T05:00:00Z Where do some bursts of high-energy gamma rays originate? Analysis | What the new gravitational waves discovery means for the future of astronomy 2017-10-17T04:00:00Z The bomb would be heavily “salted” with radioactive cobalt, which emits deadly gamma rays for years. Special Report: In modernizing nuclear arsenal, U.S. stokes new arms race 2017-11-21T05:00:00Z If a single cosmic ray collides with a particle in the solar atmosphere, it creates a shower of secondary particles and radiation, including gamma rays. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z Observation of gamma ray bursts at ground level under the thunderclouds. Photonuclear reactions triggered by lightning discharge 2017-11-21T05:00:00Z When a particle meets its antiparticle, they annihilate each other, typically releasing energetic photons called gamma rays as a result. Through a Gas, Darkly: Scientists Trace the Origins of Earth's Antimatter 2017-11-16T05:00:00Z The resulting explosion sent a burst of gamma rays streaming through space and rippled the very fabric of the universe. Scientists detect gravitational waves from a new kind of nova, sparking a new era in astronomy 2017-10-16T04:00:00Z A gamma ray is a particle of light, a photon, but it’s a very high energy form of light. It Was a Universe-Shaking Announcement. But What Is a Neutron Star Anyway? 2017-10-16T04:00:00Z So an uptick in cosmic rays should lead to an uptick in gamma rays. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z Dwyer, J. R. The relativistic feedback discharge model of terrestrial gamma ray flashes. Photonuclear reactions triggered by lightning discharge 2017-11-21T05:00:00Z When gamma rays from annihilated positrons smash into Earth’s atmosphere, they rip apart atoms, generating showers of particles that hurtle downward at nearly the speed of light. Through a Gas, Darkly: Scientists Trace the Origins of Earth's Antimatter 2017-11-16T05:00:00Z “It said, ‘This gamma ray burst has an interesting friend. Scientists detect gravitational waves from a new kind of nova, sparking a new era in astronomy 2017-10-16T04:00:00Z The source of gamma ray bursts was long thought to be colliding neutron stars, but it took the recent event to confirm that theory. 4 Surprising Facts About the Universe We Just Discovered in a Cosmic Breakthrough 2017-10-16T04:00:00Z Six other high-energy gamma rays did not coincide with ejections, which mostly occur at solar max. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z First results on terrestrial gamma ray flashes from the Fermi Gamma-ray Burst Monitor. Photonuclear reactions triggered by lightning discharge 2017-11-21T05:00:00Z Previously, scientists could only study space by observing electromagnetic waves such as radio waves, visible light, infrared light, X-rays and gamma rays. In first, scientists detect gravitational waves and light from star collision 2017-10-16T04:00:00Z But Dr. Kalogera cautioned that this was not a “vanilla gamma ray burst, being way fainter and closer than any previously observed.” LIGO Detects Fierce Collision of Neutron Stars for the First Time 2017-10-16T04:00:00Z For example, the gamma rays were relatively faint, even though the burst was closer than any previously measured short burst by a factor of 10, McEnery notes. Merging neutron stars generate gravitational waves and a celestial light show 2017-10-16T04:00:00Z So the fact they might only emit high-energy gamma rays when they do occur during a solar minimum would present quite a puzzle. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z The survey is expected to turn up supernovae, gamma ray bursts and other things that are typically obstructed from visible-light telescopes. Giant antennas in New Mexico search for cosmic discoveries 2017-09-19T04:00:00Z Previously, scientists could only study space by observing electromagnetic waves such as radio waves, visible light, infrared light, X-rays and gamma rays. In first, scientists detect gravitational waves and light from star collision 2017-10-16T04:00:00Z Those were the gamma rays, carrying news of the catastrophe to the outside universe. LIGO Detects Fierce Collision of Neutron Stars for the First Time 2017-10-16T04:00:00Z Launched by the Soviet Union on April 19, 1975, it gathered information on the Earth’s ionosphere and studied bursts of gamma rays produced by the sun. With satellites built in a shed, this physicist brought India into the Space Age 2017-08-14T04:00:00Z So as the sun meanders back toward solar minimum, astronomers are gearing up to study its gamma rays with the hope they might shed light on its mysterious interior. The Sun Is Spitting Out Strange Patterns of Gamma Rays--and No One Knows Why 2018-03-28T04:00:00Z Currently, there are more than three dozen orbiting telescopes at work, observing the cosmos in multiple wavelengths, including the visible, ultraviolet, x-ray and gamma ray. As Eclipse Watchers Look to the Sky, a New Age of Telescopes Is Dawning 2017-08-01T04:00:00Z Other options: exploding stars known as supernovae or gamma ray bursts, highly energetic explosions in outer space. This is what it would take to kill all life on Earth 2017-07-14T04:00:00Z The gamma-ray burst lasted about two seconds, which put it in a category of short gamma ray bursts associated with the formation of black holes perhaps as a result of neutron stars colliding. LIGO Detects Fierce Collision of Neutron Stars for the First Time 2017-10-16T04:00:00Z MacCallum's father was a gamma ray astronomer who did balloon-borne experiments, so he quickly realized the value of this potential customer base. Commercial balloons in the stratosphere could monitor hurricanes and scan for solar storms 2017-06-22T04:00:00Z Over an expected operating lifetime of 4 years, it will also conduct focused observations of black holes, neutron stars, and gamma ray bursts. China successfully launches x-ray satellite 2017-06-15T04:00:00Z There, supernovae explosions shower nearby planets with x-rays, gamma rays and ultraviolet photons that obliterate any ozone layer present. Ravenous Supermassive Black Holes May Sterilize Nearby Planets 2017-05-30T04:00:00Z Finally, there’s almost zero chance that gamma ray bursts would happen at a distance capable of stripping Earth of its seas. This is what it would take to kill all life on Earth 2017-07-14T04:00:00Z Soon after, they began colliding and annihilating each other in puffs of gamma rays. Giant space magnet may have trapped antihelium, raising idea of lingering pools of antimatter in the cosmos 2017-04-19T04:00:00Z World View has since carried other experiments, including a gamma ray detector and a remote-sensing system. Commercial balloons in the stratosphere could monitor hurricanes and scan for solar storms 2017-06-22T04:00:00Z The most likely explanation, Dr. Bauer said in the paper and in an interview, is that the X-rays are the afterglow from a gamma ray burst seen sideways. A Mysterious Flash From a Faraway Galaxy 2017-03-31T04:00:00Z They found a halo around the pulsar, extending a few light-years across, that was emitting very high-energy gamma rays. Case weakens for antimatter sign of dark matter 2017-03-06T05:00:00Z Under Nishida’s mandate, pregnant women and children younger than 16 were the first to receive a dosimeter, a candy bar–sized sensor that measures gamma rays. Fukushima residents exposed to far less radiation than thought 2017-01-23T05:00:00Z These stars are already known to emit high-energy radiation, like gamma rays and X-rays. Mysterious radio burst came from a galaxy 2.5 billion light years away, astronomers discover 2017-01-04T05:00:00Z Researchers in China have tried irradiating peanut extracts with gamma rays to make them less allergenic. Is It Possible to Make a Less Allergenic Peanut? 2016-12-15T05:00:00Z Quantum communications, gamma ray burst research and fluid physics. China set to launch second trial space station - BBC News 2016-09-15T04:00:00Z The energy of the positrons and electrons making these gamma rays would be far too high—at tens of thousands of GeV rather than a few hundred GeV—to explain the rise seen by AMS. Case weakens for antimatter sign of dark matter 2017-03-06T05:00:00Z The amount and frequencies of the gamma rays would provide a signature of the layout and composition of the warhead. Nuclear physicists may have just invented a ‘zero-knowledge’ warhead inspection system 2016-07-18T04:00:00Z Packing 532,000 cubic meters of helium and measuring 114 meters in diameter, the balloon circled the Southern Hemisphere for 46 days, lofting a gamma ray telescope to the edges of space. Titanic NASA balloon reaches milestone 2016-07-03T04:00:00Z The camera works by imaging gamma rays emitted by a tumor after it accumulates the radiotracer injected into the patient. Jeff Lab, Dilon Tech team up on 3-D cancer detection device 2016-07-02T04:00:00Z Instead, he was hunting for a disk-shaped halo of gamma rays around the galaxy. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z At one end, there’s UV light, gamma rays and X-rays; at the other are infrared rays and radar. Can Apple’s color-shifting screen really help you fall asleep faster? 2016-03-29T04:00:00Z This idea is being investigated by the satellite's GRaND instrument, which senses neutrons and gamma rays produced by cosmic ray interactions with surface materials. Dawn spies new detail in Ceres' bright spots - BBC News 2016-03-23T04:00:00Z Some of the delights I might encounter: gamma ray radiation and being brained by a jettisoned spaceship antenna while I’m gawping slack-jawed skywards. See the Happy Chaos at Astronauts' Landing Site 2016-03-04T05:00:00Z Everything we knew until now about the cosmos stemmed from electromagnetic waves such as radio waves, visible light, infrared light, X-rays and gamma rays. Einstein's gravitational waves detected in landmark discovery 2016-02-11T05:00:00Z But once they started analyzing the gamma rays’ origins, the halo they expected to see around Andromeda didn’t emerge. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z Everything we know about the cosmos stems from electromagnetic waves such as radio waves, visible light, infrared light, X-rays and gamma rays. Einstein's gravitational waves detected in scientific milestone 2016-02-11T05:00:00Z A mountain-sized black hole would give off X-rays and gamma rays, at a rate of about 10 million megawatts, enough to power the world's electricity supply. Stephen Hawking’s second Reith Lecture: Annotated transcript - BBC News 2016-02-02T05:00:00Z This caused them to split into smaller atoms, emit gamma rays, and release more neutrons, which then collided with more U235 atoms, setting off the chain reaction that is, in effect, the city-leveling explosion. Here's the Difference Between a Hydrogen Bomb and an Atom Bomb 2016-01-06T05:00:00Z This motion creates a stressful environment: intense heat, powerful x-rays, and gamma rays. The physics of Star Wars' Starkiller Base: could that really happen? 2015-12-20T05:00:00Z Disappointed, the team began steps to publish their results—until a reviewer suggested testing for Fermi bubbles, which would look like two circles of gamma rays above and below Andromeda’s galactic disk. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z From Earth’s orbit, the craft aims to detect high-energy particles and gamma rays. China’s dark matter satellite launches era of space science 2015-12-16T05:00:00Z Black holes enable the creation of gamma rays by accelerating particles in their orbit, causing them to collide and create high energy light, Benbow says. NASA Discovers 7.6 Billion Year Old Gamma Rays 2015-12-16T05:00:00Z It seems just as likely, he says, that the evidence for clumpiness is a result of mistaken assumptions about other sources of gamma rays such as interactions between cosmic rays and the gas between stars. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Unfortunately, the amount of matter at the Milky Way’s centre means there are many other sources of gamma rays, too. Envisaging the invisible 2015-11-11T05:00:00Z Previously seen only around the Milky Way, balloon-like puffs that glow with gamma rays may also sandwich the nearby Andromeda galaxy. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z One of the main concerns has been that the remaining plutonium was being allowed to degenerate into other radioactive components like americium, which emits gamma rays that travel farther and are hard to block. U.S. Will Clean Area in Spain Where Hydrogen Bombs Accidentally Fell 2015-10-19T04:00:00Z Benbow says scientists theorize that they were able to discover the gamma rays because they were accelerated particularly fast by the environment in the blazar . NASA Discovers 7.6 Billion Year Old Gamma Rays 2015-12-16T05:00:00Z If the neutron is contained within the core of a chlorine atom, it morphs into an argon atom and emits gamma rays. Struggling to Get a Handle on the Flavorful Neutrino 2015-10-19T04:00:00Z Maybe I was bitten by a radioactive spider or hit by invisible gamma rays, but power is power. Guaranteeing Dodgers' victory: Mets are the team to beat! 2015-10-06T04:00:00Z An illustration shows the Fermi bubbles extending from the Milky Way, based on gamma ray and X-ray data. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z Scientists previously suggested a number of possible scenarios to explain the massive die-off, including rapid cooling, volcanic gases poisoning the atmosphere or deadly gamma ray bursts from a hypernova. New Theory for What Caused Earth's Second-Largest Mass Extinction 2015-09-11T04:00:00Z The telescope will study exoplanets and gamma ray bursts, hunt for dark matter, and probe galaxy formation. Feature: An eye on the sky 2015-09-03T04:00:00Z In the 1990s, scientists searching for alternatives to pesticides bombarded diamondback moths with gamma rays to sterilize them. Replacing Pesticides With Genetics 2015-08-31T04:00:00Z Instead, positrons induce the radioactive tracer molecules to emit gamma rays, and it is those that are detected and used to chart brain function. Louis Sokoloff, NIH scientist who created technique to detect and treat major brain disorders, dies at 93 2015-08-03T04:00:00Z The Fermi-LAT Collaboration, a major gamma ray astronomy consortium, is conducting its own analysis of data from our near neighbor, which should appear later this year. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z This advanced analytical technique involves passing energy through the sample in a vacuum to search for radioactive elements emitting gamma rays. Litvinenko: A deadly trail of polonium - BBC News 2015-07-28T04:00:00Z The anthrax was supposed to have been killed with gamma rays before being shipped. North Korea accuses US of targeting it with anthrax and asks UN for help 2015-06-12T04:00:00Z The result is an atom that decays within a few hours, generating gamma rays - radiation that can be used to produce medical images. The element that can make bones glow - BBC News 2015-05-29T04:00:00Z Blazars emit copious amounts of gamma rays, which are very high-energy photons. Black Hole "Blazars" Reveal Hidden Side of the Universe [Video] 2015-05-28T04:00:00Z And if three Russian astronomers are right, Andromeda also shares a surprising skill with the Milky Way: a talent for blowing giant bubbles that glow with gamma rays. The Galaxy Next Door May Be Blowing Giant Double Bubbles 2016-04-19T04:00:00Z He recognised it immediately as the small gamma ray signal from polonium-210. Litvinenko: A deadly trail of polonium - BBC News 2015-07-28T04:00:00Z Outer space may look mostly empty, but it’s actually packed with cosmic radiation—gamma rays and charged particles produced by exploding stars, black holes and other violent astrophysical phenomena. Mars Travelers Could Suffer Radiation Brain Damage 2015-05-07T04:00:00Z Crawford, a General Electric mechanic, acknowledges reading something about gamma rays, contacting his congressman and the Israeli embassy about the idea of using them on Islamic terrorists, and then being approached by “undercovers.” X-ray weapon defendant says authorities concocted plot 2015-04-02T04:00:00Z The Sierra Negra volcano in the central Mexican state of Puebla is the site of an ambitious astrophysical project which houses the largest gamma ray observatory ever built on the planet. Supermassive backhole detector ready for business 2015-03-25T04:00:00Z Further, Randall notes that if dense clumps do exist in a thin disk of dark matter, the dark matter should occasionally annihilate in the clumps to produce gamma rays. Fact or Fiction?: Did Dark Matter Kill the Dinosaurs? 2015-03-25T04:00:00Z Unlike X-rays and gamma rays, the radiation emitted and received by wireless devices is far too low in frequency to shake apart the molecules in living cells. When Science Is Lost in a Legal Maze 2015-03-23T04:00:00Z As Tillie explains, gamma rays sometimes cause mutations, “good ones,” of marigolds. Keep Mom Away From the Pet Rabbit: A Review of ‘The Effect of Gamma Rays on Man-in-the-Moon Marigolds,’ in Croton Falls 2015-03-13T04:00:00Z Moreover, Dr. Geringer-Sameth’s team was only one of two groups that independently found the galaxy in the dark energy data and searched the Fermi results for gamma rays from it. Gamma Rays May Be Clue on Dark Matter 2015-03-10T04:00:00Z Fermi’s gamma rays are more than a million times more energetic than the x-rays, so the particles that created the former would be more massive than a proton. Weird X-Rays Spur Speculation about Dark Matter Detection 2015-01-26T05:00:00Z Only the gamma ray, X-ray and UV photons carry enough energy to damage DNA and cause mutations. Why Scientists Say Wi-Fi Signals Won't Give Your Kids Cancer 2015-01-19T05:00:00Z They carefully searched for the “fingerprints” of plutonium decaying to uranium—gamma rays emitted by atomic nuclei and x-rays emitted by electrons—using a germanium ionization detector. Manhattan Project Plutonium, Lost to Obscurity, Recovered by Scientists 2015-01-15T05:00:00Z Earlier this year, researchers used publicly available data gleaned from NASA’s Fermi gamma-ray space telescope to identify an excess of high-energy gamma rays from our galactic center. New Doubt About Dark Matter 2014-12-20T05:00:00Z A small, newly discovered galaxy orbiting the Milky Way is emitting a surprising amount of electromagnetic radiation in the form of gamma rays, astronomers reported Tuesday. Gamma Rays May Be Clue on Dark Matter 2015-03-10T04:00:00Z They used the Fermi Gamma-ray Space Telescope to detect two huge lobes of gamma ray–emitting gas that extend far above and below the Milky Way's center. Clocking the hot gas gushing from the Milky Way's core 2014-12-19T05:00:00Z These are big, monster bursts of gamma rays, and one would think these must be monster storms producing them. Cosmic bangs 'common on Earth' 2014-12-16T05:00:00Z Astrophysicists once thought gamma ray bursts would be most common in regions of galaxies where stars are forming rapidly from gas clouds. Complex life may be possible in only 10% of all galaxies 2014-11-24T05:00:00Z There are two basic types of gamma ray bursts, long and short. Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space In the centers of galaxies, where dark matter is densest, the Wimp particles would collide and annihilate one another in a telltale flash of gamma rays, the thinking goes. Gamma Rays May Be Clue on Dark Matter 2015-03-10T04:00:00Z Plotting the luminosity of the accretion disks against the gamma ray power of their jets, the team reports online today in Nature that there is a clear linear relationship between the two. What powers a black hole's mighty jets? 2014-11-19T05:00:00Z Second, the gamma rays would also stir up chemical reactions that create ozone-killing molecules sufficiently powerful to destroy more than 90% of an Earthlike planet’s ozone layer, and keep it destroyed for several years. Bolts from the blue 2014-10-16T04:00:00Z Short gamma ray bursts last less than a second or two; they most likely occur when two neutron stars or black holes spiral into each other. Complex life may be possible in only 10% of all galaxies 2014-11-24T05:00:00Z Gehrels says it produced “by far the best data set we’ve gotten from a gamma ray burst,” which helped scientists learn about the physics of the explosion process and challenged standard models. Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space The likely causes included volcanism, gamma ray bursts, and, in the case of the Cretaceous-Paleogene wipeout, an asteroid strike—the one that killed the dinosaurs. The Sixth Great Extinction is Underway—and Guess Which Big-Brained Species is to Blame 2014-07-25T04:00:00Z It can provide a personalized weather report, detect X-rays and gamma rays, calculate distances to a target, and a whole lot more. Star Trek’s Tricorders Are Almost Here 2014-07-03T04:00:00Z But Richmond says for astronauts voyaging beyond Earth’s protective magnetosphere, then the x-rays and gamma rays from such a supernova 150 light years away might indeed harbor enough radiation to sicken a space crew. Odds Remain Against Earth Being Hit By Lethal Supernova 2014-06-30T04:00:00Z Rather, if the explosion were close enough, the gamma rays would set off a chain of chemical reactions that would destroy the ozone layer in a planet's atmosphere. Complex life may be possible in only 10% of all galaxies 2014-11-24T05:00:00Z When Swift first captured the location of a short gamma ray burst in 2005, it was a “scientific verification of the model.” Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space Radiation from a flare is made up of nearly the entire range of electromagnetic waves, from the long to the short — radio waves, optical, x-rays and gamma rays — explains NASA. Burst of plasma from solar flare could glance Earth this Friday the 13th 2014-06-13T04:00:00Z So looking for gamma rays is not the only way to look for dark matter annihilation. When Will We Find Dark Matter? 2014-05-16T04:00:00Z They are also known by their "starquakes" that send gamma ray radiation into the cosmos. Mysterious "Magnetar" Likely Formed with Help from Runaway Star 2014-05-14T04:00:00Z “We’re claiming the detection of anomalous gamma rays, and no more,” he says. The Mystery of Dark Matter: WIMPS May Have the Answer 2014-04-08T20:33:38Z Last year, Swift, in collaboration with NASA's Fermi Gamma-ray Space Telescope, captured the brightest gamma ray burst yet. Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space Scanning steel needs high-power X-rays, or even gamma rays. High-tech shipping containers: Boxing clever 2014-02-27T16:07:00Z We also are significantly improving our reconstruction of the gamma rays within our detector. When Will We Find Dark Matter? 2014-05-16T04:00:00Z The first rapidly spinning black widow has been discovered using only gamma rays. The Return of Physics Week in Review! February 22, 2014 2014-02-22T10:10:33Z Heat exchange between the media used to absorb the energy from the decelerating protons, neutrons and gamma rays is going to be difficult, too. Do We Really Need Nuclear Fusion for Power? 2014-02-13T08:10:00Z Roughly six months into its mission, Swift helped scientists identify for the first time ever the precise location of a short gamma ray burst, which lasted only about 50 milliseconds. Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space In 2013, NASA’s Swift telescope spotted a burst of gamma rays 3.9 billion light years from Earth that were consistent with such a cosmic crack-up. Top 10 Space Moments 2013-12-08T01:50:20Z Dangers: It emits cancer-causing gamma rays, and its effect depends on the level of exposure and whether the material was inhaled, ingested or absorbed through the skin. After scare, stolen radioactive cargo recovered 2013-12-05T04:11:43Z Large amounts of cobalt 60 are also used to sterilize spices and some foods because its powerful gamma rays kill bacteria and other pathogens without damaging the products or leaving them radioactive. Dangerous Radioactive Substance Is Stolen in Mexico 2013-12-04T17:05:13Z The team zapped the 54calcium to get it up to the next shell, called an excited state, then let it decay back to its lower-energy shell, in the process emitting a gamma ray. New Magic Number inside Atoms Discovered 2013-10-09T17:45:04.163Z When Swift was about five years old, it discovered two long gamma ray bursts that were among the most distant objects ever to be observed. Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space That’s because that radition, in the form of X-rays, gamma rays, radio waves, is emitted when large objects – like giant gas clouds or stars – are brought into the black hole’s gravitational field. The Milky Way's Supermassive Black Hole Erupted Two Million Years Ago 2013-09-25T06:07:00Z Tepco said the radiation measured was beta rays, which would be easier to protect against than gamma rays. Radiation Readings Spike at Water Tank at Japan's Ruined Nuclear Plant 2013-09-01T20:45:04.600Z “Because it emits such strong gamma rays, external exposure to cobalt 60 is also considered a significant threat,” it says. Dangerous Radioactive Substance Is Stolen in Mexico 2013-12-04T17:05:13Z The energy of these gamma rays revealed how much of an energy gap separated the two states. New Magic Number inside Atoms Discovered 2013-10-09T17:45:04.163Z In 2011, scientists observed an event much longer than a typical gamma ray burst, emitting light for a full day. Forget Interstellar, Watch Milestones From NASA Swift’s 10 Years in Space To analyze the structure and chemical composition of the beads, researchers bombarded them with neutrons and gamma rays. Ancient Jewelry Had Extraterrestrial Origin 2013-08-28T22:15:00.797Z Though you can transmit the entire electromagnetic spectrum, from radio waves to gamma rays, there are problems. The Idea: An Inventor Wants One Less Wire to Worry About 2013-08-17T18:37:03Z No gamma rays, x-rays, or some kind of other deadly-sounding comic book fictional energy rays are needed. Fighting Tooth and Claw with Wolverine Examining the Healing Power of an X-Man 2013-07-27T01:45:07.323Z That all changed last month when NASA’s orbiting Swift telescope initially spotted a burst of high-energy gamma rays that lasted just two-tenths of a second. Gold in Space 2013-07-18T23:05:22Z Prof Edo Berger and colleagues from Harvard University analysed Hubble observations of a short burst of gamma rays, lasting only one fifth of a second, seen from a galaxy 3.9 billion light years away. Neutron starbursts can forge gold 2013-07-18T19:53:11Z That, at least, is the conclusion of astronomers at the Harvard-Smithsonian Center For Astrophysics, who arrived at this conclusion after studying a large gamma ray burst that was observed last month. Gold May Form When Neutron Stars Collide 2013-07-18T05:15:00Z A sievert is an international unit for measuring the effects of different kinds of radiation on living tissue: 1 Sv of gamma rays causes the same amount of tissue damage as 1 Sv of x-rays. How Much Do CT Scans Increase the Risk of Cancer? 2013-07-09T12:15:05.670Z Fermi scans in every direction, gathering gamma rays from the whole cosmos every three hours. 'Extreme Universe' map gets update 2013-07-01T09:36:37Z He brought up a testing system he proposed in the 1990s that measures the gamma rays nuclear warheads emit, which are more plentiful than neutrons and are statistically more likely to be accurate, he says. Put Up Your Nukes: Researchers Devise "Blind" Verification System for Nuclear Arms Treaty 2013-06-27T16:45:00.827Z Astronomers suggest that such collisions are responsible for ultra-short bursts of gamma rays occasionally seen across the Universe. Neutron starbursts can forge gold 2013-07-18T19:53:11Z That gamma ray burst, dubbed GRB 130603B, was initially observed by NASA’s Swift Satellite, and subsequently observed with the Hubble Space Telescope. Gold May Form When Neutron Stars Collide 2013-07-18T05:15:00Z Another was to dedicate the instrument to gamma ray astronomy. NASA Narrows Possible Uses for Former Spy Telescopes 2013-06-06T22:25:00Z "If we see a source that only emits gamma rays and not radio and optical, of course that would be a good candidate for dark matter," Dr Paneque said. 'Extreme Universe' map gets update 2013-07-01T09:36:37Z It was designed to track gamma ray bursts and their afterglows. NASA Makes High Res Maps Of Our Neighboring Galaxies 2013-06-05T04:44:11Z Microwave radiation is far weaker than the radiation in X-rays or gamma rays. Eleanor R. Adair, Microwave Safety Researcher, Dies at 86 2013-05-05T23:33:31Z In the Milky Way, a gamma ray burst happens about every 100,000 years. Gold May Form When Neutron Stars Collide 2013-07-18T05:15:00Z Then the electrons collide with atoms in the air, generating even more electrons as well as x-rays and gamma rays. Do Cosmic Rays Grease Lightning? 2013-05-03T21:15:00Z What remains a mystery is how gamma rays are created at such extraordinary energies. 'Blazar' flare-up stuns physicists 2013-04-16T07:51:13Z To learn what might trigger the transformation, they began measuring radiation of the lightning that thunderstorms routinely emit and discovered something unexpected: the gamma rays and X-rays of dark lightning. Thunderstorms contain ‘dark lightning,’ invisible pulses of powerful radiation 2013-04-08T21:58:00Z The objects that Funk and his colleagues studied both glow brighter in gamma rays than any other supernova remnants, which made them obvious targets for the search. Fermi Satellite Tracks Cosmic Ray Origins back to Supernova Remnants 2013-02-19T19:15:07.997Z Lower energy gamma rays don't appear in their energy spectrum. Source of High-Energy Cosmic Rays Nailed at Last 2013-02-14T19:35:00Z Cosmic rays are created deep in space by powerful events such as star collisions, gamma ray bursts, and supernovae. Do Cosmic Rays Grease Lightning? 2013-05-03T21:15:00Z Active galaxies and the supermassive black holes they host remain mysterious to physicists The skies are currently being flooded with the brightest display of gamma rays - the Universe's highest-energy light - ever seen by astronomers. 'Blazar' flare-up stuns physicists 2013-04-16T07:51:13Z Nuclear explosions and collapsing stars — those are the sorts of extreme events that had been known to spew out gamma rays, not mere thunderstorms. Thunderstorms contain ‘dark lightning,’ invisible pulses of powerful radiation 2013-04-08T21:58:00Z “And at these low energies the gamma rays don’t leave a lot of information in the detector.” Fermi Satellite Tracks Cosmic Ray Origins back to Supernova Remnants 2013-02-19T19:15:07.997Z Electrons accelerated by the supernova remnant also produce gamma rays, but by a different mechanism that leaves a subtle difference in the energy spectra of the two sets of gamma rays. Source of High-Energy Cosmic Rays Nailed at Last 2013-02-14T19:35:00Z Those pions decay quickly into the gamma rays that the scientists tracked. Scientists Confirm Cosmic Rays Come From Exploding Stars 2013-02-14T19:00:27Z First, by detecting gamma rays rather than visible or infrared photons, they don’t require darker-than-night conditions, which are the bane of optical entanglement experiments. How to Build Your Own Quantum Entanglement Experiment (Part 1 of 2) 2013-02-08T16:45:03.680Z The theory is that these energetic electrons collide with atoms inside thunderclouds to create X-rays and gamma rays. Thunderstorms contain ‘dark lightning,’ invisible pulses of powerful radiation 2013-04-08T21:58:00Z When I go out in direct sunlight, I have to wear the sort of sunblock that could probably deflect gamma rays. Remember Movember: the science behind the moustache 2012-11-20T13:07:00Z The pion decays almost immediately into two gamma rays—the neutral messengers that show high-energy protons are present. Source of High-Energy Cosmic Rays Nailed at Last 2013-02-14T19:35:00Z If the storms here on Earth are producing gamma rays and antimatter, I wonder what the lightning storms on Jupiter and Saturn are doing. Readers Respond to "Building a Better Science Teacher" 2012-11-16T15:45:00.260Z For this, they relied on blazars, faraway galaxies that emit gamma rays. Observatory: Scientists Detect Starlight From Early Universe 2012-11-02T20:31:36Z Also, do gamma rays from a positron-electron reaction have a characteristic wavelength that can be observed? Readers Respond to "Cyborg Humanity" 2012-09-21T18:15:00.263Z Scientists are beginning to understand how thunder clouds produce powerful gamma rays–and antimatter. The Countdown, Episode 2: a Mars Party, Star vs. Black Hole, Thunderous Gamma Rays, Meteoroid Fireworks, Money for Space Taxis 2012-08-10T18:45:11.687Z The 28-meter telescope is designed to identify very high energy gamma rays. Scopes See Exoplanets and Violent Astrophysics 2012-07-31T19:15:04.707Z For Olympics organizers who pride themselves on putting on a carefully choreographed - obsessively controlled, some would say - 17-day show, the bursts of Twitter activity are like gamma rays escaping from a solar flare. Olympics awash in Twitter, for better or worse 2012-07-31T14:26:09Z WIMPs might also annihilate one another when they collide to produce ordinary particles such as gamma rays, and astrophysicists are combing the heavens for signs of such annihilations. Gamma-Ray Glow Hints at Dark Matter in the Center of Our Galaxy 2012-07-27T22:55:34Z Gal-Yam describes how the production of electrons and positrons removed such stars' supporting pressure of gamma rays, leading to their sudden collapse. Readers Respond to "Cyborg Humanity" 2012-09-21T18:15:00.263Z Our group specializes in using gamma ray spectroscopy to learn about these exotic nuclei. 30 under 30: Playing Billiard Balls With Neutrons and Protons to Understand Exotic Nuclei 2012-06-25T12:45:05.203Z And gamma rays, the most energetic kind of electromagnetic radiation, already pack a pretty good wallop. Scopes See Exoplanets and Violent Astrophysics 2012-07-31T19:15:04.707Z In 2010 the researchers, again using the Fermi telescope, identified huge bubbles above and below the plane of the Milky Way, glowing with gamma rays. Vestiges of Violence: Towering Gamma-Ray Jets Point to Past Outbursts from Milky Way's Black Hole 2012-06-01T11:15:00.407Z They then fit the data with another model that included a contribution from dark matter annihilations, including theoretical estimates of the dark matter's distribution and how the particle annihilations produce gamma rays. Gamma-Ray Glow Hints at Dark Matter in the Center of Our Galaxy 2012-07-27T22:55:34Z Wouldn't they collide with the electrons, be converted back to gamma rays and thus restore support for the star? Readers Respond to "Cyborg Humanity" 2012-09-21T18:15:00.263Z The difference is that Dr Abe is not using namby-pamby X-rays and gamma rays to mutate her crop, as is the way in most other countries. Salt-tolerant rice: Nuclear-powered crops 2012-05-03T15:00:45Z In principal, you should be able to spot these photons in the form of high-energy gamma rays. Closing in on Dark Matter: Another "Tentative" Step 2012-04-23T19:15:00.250Z One, NorthStar Medical Radioisotopes, uses an accelerator to create gamma rays that bombard yet another type of molybdenum, moly 100; the bombardment causes the substance to eject a neutron and become moly 99. G.E. Ends Bid to Create a Supply of Technetium 99m 2012-02-06T23:40:04Z There is nary a gamma ray or accelerated particle to be found. Could Simple Experiments Reveal the Quantum Nature of Spacetime? 2012-02-02T15:45:22.977Z In order to become more stable, the nucleus of an actinide element undergoes radioactive decay, releasing gamma rays, alpha particles, beta particles, or neutrons. The Disappearing Actinides, and Other Frustrations from the Bottom Row of the Periodic Table of the Elements 2012-01-27T18:45:02.817Z More distant objects have been spotted in recent years, such as a gamma ray burst and a galaxy more than 13 billion light-years away, but this quasar is hundreds of times more luminous. The Year in Pictures 2011-12-22T19:11:37Z Since the Large Area Telescope was built to study gamma rays, it’s an ideal instrument for this kind of search. Closing in on Dark Matter: Another "Tentative" Step 2012-04-23T19:15:00.250Z The initial blast of high-energy gamma rays would strike air molecules and create a shower of high-energy electrons, he writes. High-Altitude Nuclear Explosions Dangerous, but not for Reasons Gingrich Cites 2011-12-15T00:45:06.827Z In this technique, a few milligrams of hair are bombarded with neutrons, forcing stable elements in the hair to radioactively decay and emit gamma rays, which are unique to each chemical element in the follicles. Was Jane Austen Poisoned by Arsenic? Science May Soon Find Out 2011-12-05T13:15:00.263Z If this scenario is correct, then the gamma ray burst happened billions of years ago – far away from the Earth. Scientists Develop Two Scenarios For Cosmic Christmas Explosion 2011-12-01T06:52:45Z Powerful Jet Being Produced by Star-Eating Black Hole On 28 March, NASA’s Swift satellite observed a flash of gamma rays brighter than anything astronomers had seen before. The Year in Pictures 2011-12-22T19:11:37Z Specifically, he’s claimed to spot the candidate gamma rays at 130 billion electron volts. Closing in on Dark Matter: Another "Tentative" Step 2012-04-23T19:15:00.250Z After the initial nanoseconds-long blast of gamma rays, a nuclear bomb releases about 70 percent of its total energy in the form of x-rays. High-Altitude Nuclear Explosions Dangerous, but not for Reasons Gingrich Cites 2011-12-15T00:45:06.827Z The heavily-armored aircraft will lug a suite of high-tech instruments into the hearts of storms to study everything from how hail and lightning form to mysterious bursts of high-energy gamma rays. Live Chat: The Science of Storm Chasing 2011-11-16T17:13:18Z In this scenario, the gamma ray burst was caused by a large, comet-like object that fell into a neutron star. Scientists Develop Two Scenarios For Cosmic Christmas Explosion 2011-12-01T06:52:45Z The key evidence—the polarization of gamma rays emitted by material just before it is swept into the black hole—is reported online this week in Science. The Year in Pictures 2011-12-22T19:11:37Z The show includes climate change and species distributions, pulsar gamma ray emissions, the case for 'the Anthropocene,' and more. [Podcast] Science Podcast 2011-10-06T18:26:08.100Z Messenger's studies of Mercury's past involved using the ship's gamma ray spectrometer and x-ray emissions detector to analyze the composition of the planet's surface. Planetary Mystery: How in the World Did Mercury Form? 2011-09-29T19:38:16Z He took the full dose of gamma rays right in his back. The Image and the Likeness 2011-08-23T02:00:33.617Z The result is a burst of radiation across the spectrum, from radio waves to x-rays and gamma rays. Solar Storms May Disrupt Gadgets 2011-08-08T16:36:31Z These air showers include a variety of elementary particles, including pions, gamma rays, and muons, the latter of which are most likely to survive to be detected at the surface. Paris: City of Light and Cosmic Rays 2011-07-04T14:15:00.943Z Man observed these rays proceeding from radium, but, not knowing the cause of them, he called them gamma rays. Autobiography of an Electron Wherein the Scientific Ideas of the Present Time Are Explained in an Interesting and Novel Fashion 2011-06-19T02:00:25.633Z What intrigued the researchers about this gamma ray burst is that it flared up four times over a period of four hours. Massive black hole devours star 2011-06-16T20:58:47Z It was called radiation injury, the internal destruction of cell structure by gamma rays emitted by the bomb. The Image and the Likeness 2011-08-23T02:00:33.617Z As it did so, the black hole emitted powerful gamma ray jets from its center as bits of the dying star were turned into energy. Black hole shreds star, sparking gamma ray flash 2011-06-16T20:41:54Z The event, which was observed on March 28, was originally thought to be a gamma ray burst from a collapsing star but researchers suspected something more sinister was at play. Unusual Celestial Event Was Black Hole Swallowing a Star 2011-06-16T19:00:15Z One topic of discussion at the meeting is the classification of various gamma ray sources. Best-yet view of extreme Universe 2011-05-13T10:58:38Z While the sky abounds with light across all parts of the spectrum, is designed to measure only the most energetic light: gamma rays. Crab Nebula unleashes huge flare 2011-05-11T14:20:05Z The process has the added benefit of being resistant to nuclear proliferation, because its end products emit enough gamma rays to make the fuel dangerous to handle and easy to track. World Changing Ideas: 20 Ways to Build a Cleaner, Healthier, Smarter World (preview) 2011-05-01T14:15:51.830Z Rather than just external gamma rays, plants and animals are absorbing and ingesting particles of radioactive cesium and iodine, putting these isotopes directly into their tissues. Primer: Will Radiation Lay Waste Japan's Fish? 2011-04-06T23:16:46Z Traditional gamma ray bursts involve a deluge of high-energy photons bursting through the air. Unusual Celestial Event Was Black Hole Swallowing a Star 2011-06-16T19:00:15Z The Fermi collaboration will soon release a full catalogue of all the gamma ray sources discovered so far. Best-yet view of extreme Universe 2011-05-13T10:58:38Z If you look in optical light, the Crab is very steady; in radio emission, it's very steady; in very, very high-energy gamma rays it's very steady. Crab Nebula unleashes huge flare 2011-05-11T14:20:05Z The company uses a standard technique called gamma ray spectroscopy, which involves examining the energy levels of the gamma rays, a form of radiation, to determine types of isotopes and their levels. Radiation Errors Erode Confidence in Power Company 2011-04-05T16:50:08Z The key evidence—the polarization of gamma rays emitted by material just before it is swept into the black hole—is reported online this week in . ScienceShot: Black Holes are Messy Eaters 2011-03-25T18:22:32Z The absence of water also reduces the extent to which workers are shielded from radiation, with gamma rays able to pass into the air unobstructed. Choppers and cannons bring no nuclear relief 2011-03-17T15:02:16Z Workers would be at risk for illness or death because of high levels of gamma rays and other ionizing radiation. Wind and Rain Steer Radiation?s Reach 2011-03-16T01:46:43Z As they move in curved paths, the particles emit the gamma rays seen by Fermi. Crab Nebula unleashes huge flare 2011-05-11T14:20:05Z While sailing, the craft's suite of scientific instruments caught gamma ray bursts, collected data on space dust, and participated in very long baseline interferometry observations of celestial objects. Japan's IKAROS Solar Sail Mission Extended for a Year 2011-01-26T16:58:56Z In the past three decades, astronomers have described the nature of gamma ray bursts, proved that the expansion of the universe is accelerating, and helped land rovers on Mars. NASA's plans for manned expedition to Mars may include solar-powered spacecraft 2011-01-25T02:00:03Z "One of the great things about the Gamma-ray Burst Monitor is that it detects flashes of gamma rays all across the cosmic scale," explained Julie McEnery, Fermi project scientist at Nasa. Antimatter 'streams from storms' 2011-01-11T08:34:33Z The short duration suggests the gamma rays originate in a relatively small part of the inner nebula. Crab Nebula Outbursts Shock Astronomers 2010-12-08T19:35:00Z "Most black holes in the universe should form when the core of a star collapses and a gamma ray burst is not produced." Scientists witness the apparent birth of a black hole 2010-11-16T14:31:00Z Cummings had none of them in large quantity, and none had the high output of gamma rays that would make for the most dangerous kind of dirty bomb, but he was looking for more-lethal ingredients. Locked and Loaded: The Secret World of Extreme Militias 2010-09-30T08:45:00Z After arriving in France, Khroma went to a special conservation facility in Grenoble, where it underwent gamma ray treatment for eliminating any potentially lethal bacteria. Ice Age baby mammoth on display at French museum 2010-07-16T21:58:00Z "But what absolutely intrigues us is the discovery that TGFs produce not just gamma rays but also produce positrons, the antimatter equivalent to electrons." Antimatter 'streams from storms' 2011-01-11T08:34:33Z Early on, he suggested the use of high-energy gamma rays to see inside the wrecked blowout preventer, providing data that helped guide later steps at controlling the oil flow. Energy Secretary Emerges to Take a Commanding Role in Effort to Corral Well 2010-07-17T01:45:00Z Help came from Scott Watson, an expert in gamma ray imaging at Los Alamos National Laboratory. Failure of Rig?s Last Line of Defense Tied to Myriad Factors 2010-06-21T03:23:00Z Nevertheless, it took an outsider—Energy Secretary Steven Chu, who has a Nobel Prize in physics—to come up with the idea of peering inside the malfunctioning blowout preventer with high-energy gamma rays. The Other U.S. Energy Crisis: Lack of R&D 2010-06-17T04:01:00Z Telescopes sensitive to infrared, microwave, gamma ray, x-ray and ultraviolet frequencies led to the discovery of pulsars, quasars, black holes and radiation lingering from the Big Bang itself. Using Earth to Map the Cosmos 2010-06-01T04:19:00Z That clearly didn't happen, though: when particles meet their antiparticles, they annihilate each other in a burst of energetic gamma rays. Big News About Small Particles -- and Why it Matters 2010-05-20T15:25:00Z The radioactive material, identified earlier by investigators as Cobalt-60, was contained in a machine that students used for laboratory experiments to study the effects of gamma rays ... Radioactive Scrap Traced to Delhi University 2010-04-29T07:37:00Z In mid-May, Mr. Watson ventured to the well site, where robotic submersibles were sent down to the seafloor with cobalt 60, a radioactive isotope that generates gamma rays. Failure of Rig?s Last Line of Defense Tied to Myriad Factors 2010-06-21T03:23:00Z But occasionally a gamma ray will encounter another photon, or particle of light, of much lower energy. Cosmic Magnetic Field Strength Measured 2010-04-02T14:39:00Z Tech 99m is valued because it emits a gamma ray that is easy to spot in the patient’s body. 2010-02-16T19:11:00Z These have been named the alpha, beta, and gamma rays, respectively. A Brief Account of Radio-activity In the Ambassador's room, an invisible spray of gamma rays silently began to flood the room with deadly radiation. Diplomatic Immunity But now, the gamma ray images showed that at least one blade was fully deployed, and they had run out of options for forcing the other one closed. Failure of Rig?s Last Line of Defense Tied to Myriad Factors 2010-06-21T03:23:00Z The collision causes the gamma ray to splinter into an electron and a positron. Cosmic Magnetic Field Strength Measured 2010-04-02T14:39:00Z Of these the beta rays are deviated strongly by the magnetic field, the alpha much less so—very slightly, in fact—while the gamma rays are not affected at all. A History of Science, Volume 5(of 5) Aspects Of Recent Science Gamma Rays The gamma rays are very penetrating and are not deflected in the magnetic or electric fields. A Brief Account of Radio-activity "What did you mean about gamma rays, Buck?" The Ultimate Weapon It certainly can't be anything less than gamma rays and probably even of greater frequency. Islands of Space They later recombine to form a gamma ray again, which proceeds unharmed, but with a lower intensity. Cosmic Magnetic Field Strength Measured 2010-04-02T14:39:00Z To these radiations there sometimes are added in the course of experiments secondary radiations analogous to those of M. Sagnac, and produced when the alpha, beta, or gamma rays meet various substances. The New Physics and Its Evolution The gamma rays are analogous to the X rays and are of the order of light. A Brief Account of Radio-activity Nothing happened save that several gamma ray bombs went off explosively, and all the atomic bombs in its path exploded at once. The Ultimate Weapon On the way down, and after they reach the ground, the radioactive particles give off invisible gamma rays--like X-rays--too much of which can kill or injure people. In Time of Emergency A Citizen's Handbook on Nuclear Attack, Natural Disasters (1968) Studying ancient magnetic fields using gamma rays might shed light on processes at work very early in the universe, she says. Cosmic Magnetic Field Strength Measured 2010-04-02T14:39:00Z Polonium contains especially alpha rays and a few gamma rays. The New Physics and Its Evolution They have for the sake of convenience been called the alpha, beta, and gamma rays. A Brief Account of Radio-activity Then they were instantly destroyed by atomic bombing, or gamma rays. The Ultimate Weapon Radium compounds send forth three kinds of rays, distinguished as alpha, beta, and gamma rays. The Story of Alchemy and the Beginnings of Chemistry After these, the gamma rays of ultra short wave length are most important; these cause injuries similar to those from over-doses of X-rays. The Atomic Bombings of Hiroshima and Nagasaki Massless but energetic gamma rays can knock electrons out of neutral atoms in the same fashion as X-rays, leaving them ionized. Worldwide Effects of Nuclear War: Some Perspectives The gamma rays have been identified with the X rays discovered by Röntgen and are a form of energy analogous to light. A Brief Account of Radio-activity Atomic and gamma ray bombs started now, flashing sometimes dangerously close to the station as its magnetic field battled the rotating field of the ships. The Ultimate Weapon Radium emits, as I told you before, three kinds of rays, the alpha, beta, and gamma rays, each with different properties. The War Terror Probably the two most direct designations are radiation injury and gamma ray injury. The Atomic Bombings of Hiroshima and Nagasaki The gamma rays are therefore specific to the atomic bomb and are completely absent in T.N.T. explosions. The Atomic Bombings of Hiroshima and Nagasaki Such rays would be absorbed, and the gamma rays likewise, in passing through the earth's atmosphere and so escape ordinary observation. A Brief Account of Radio-activity The gamma rays are the longest, perhaps three inches long, and it is these rays which effect cures, for they check the abnormal and stimulate the normal cells. The War Terror A magnet," he explained, "shows the difference between the alpha, beta, and gamma rays. The War Terror The gamma rays on the other hand are emitted by the atomic nuclei themselves when they are transformed in the fission process. The Atomic Bombings of Hiroshima and Nagasaki |
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