| 单词 | particle detector |
| 例句 | These particles are virtual particles like the particles that carry the gravitational force of the sun: unlike real particles, they cannot be observed directly with a particle detector. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The force-carrying particles exchanged between matter particles are said to be virtual particles because, unlike “real” particles, they cannot be directly detected by a particle detector. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The nuclei embedded in a particle detector, which timed and measured decay products to reveal the identity of the superheavy nucleus—and how long it lived. Hopes evaporate for the superheavy element flerovium having a long life 2021-02-12T05:00:00Z The most logical explanation, Ting says, is that the particle detector, a project of 56 agencies in 16 countries, is seeing by-products of collisions of relatively high-mass dark matter particles. Space Station Dark Matter Experiment Gets Vital Repairs 2019-12-11T05:00:00Z At the meeting, physicist Zhaowen Tang of the Los Alamos lab described how researchers could put a particle detector inside a bottle neutron trap and count neutrons using both methods. How long do neutrons live? Physicists close in on decades-old puzzle 2019-04-14T04:00:00Z Writing in Nature Physics, the IceCube Collaboration1 now uses neutrinos seen in the world’s largest particle detector to scrutinize another cornerstone of physics: Lorentz invariance. Special relativity validated by neutrinos 2018-08-12T04:00:00Z At Stanford, by first designing and financing, then building and finally using a high-energy particle accelerator and an advanced particle detector, Dr. Richter made a discovery that startled science. Burton Richter, Nobel Prize-winning physicist, dies at 87 2018-07-21T04:00:00Z In a particle detector—usually a huge barrel-shaped assemblage of various sensors—a photon typically creates a spray of particles or “shower” in a subsystem called an electromagnetic calorimeter. AI is changing how we do science. Get a glimpse 2017-07-05T04:00:00Z To a nonaccelerating observer, the vacuum is devoid of particles—so that if he holds a particle detector it will register no clicks. Does space heat up when you accelerate? Physicists propose test of controversial idea 2017-04-14T04:00:00Z They merely turned off the trap and let the remaining anti-atoms float into a surrounding particle detector. Deep probe of antimatter puts Einstein’s special relativity to the test 2016-12-19T05:00:00Z This particle detector was of vital importance in the Nobel work. James Cronin, Nobel laureate who overturned long-accepted beliefs about the fundamental symmetry of laws of physics , dies at 84 2016-08-28T04:00:00Z These particles are called virtual because unlike real particles they cannot be observed directly with a particle detector. Stephen Hawking’s second Reith Lecture: Annotated transcript - BBC News 2016-02-02T05:00:00Z The higher dimensions are wound so tightly that they are too small to observe at energies accessible through collisions in any practicable future particle detector. Scientific method: Defend the integrity of physics 2014-12-15T05:00:00Z But observations from the Alpha Magnetic Spectrometer, a particle detector on the International Space Station, revealed last year that the ratio of positrons to electrons actually increases with energy1. European probe shoots down dark-matter claims 2014-12-01T05:00:00Z An even thornier possibility is that dark matter only interacts with normal matter via gravity, meaning that snagging dark matter in a particle detector may be forever beyond our grasp. Dark Matter s Elusiveness Means Search May Soon Become More Challenging 2014-01-02T11:45:00.417Z The first results from a particle detector called show it is the most powerful experiment of its kind. Dark matter hunt nears final phase 2013-10-30T16:26:30Z A long-standing controversy among particle physicists looks to be settled—in the less exciting way—thanks to new data from an ultrasensitive particle detector deep underground. Are Neutrinos Their Own Antiparticles? 2013-07-16T22:50:00Z A second particle detector known as the Voyager Cosmic Ray Subsystem noted a similar change: charged atomic nuclei from the sun disappeared as nuclei from outside the solar system surged. Voyager 1 Returns Surprising Data about an Unexplored Region of Deep Space 2013-06-27T19:15:08.627Z Krimigis's particle detector worked by rotating sensors to scan different parts of the sky, which shook the nearby plasma instrument and irritated the scientists in charge of it. Voyager: Outward bound 2013-05-22T17:20:35.240Z The results are the first obtained by a $2 billion particle detector, known as Alpha Magnetic Spectrometer, or AMS, that is mounted on the exterior of the international space station. Scientists Find Hint of Dark Matter 2013-04-03T23:25:13Z Scientists hope to detect that rare event when a particle of dark "stuff" bumps into regular matter Inside a house-sized tank, a large metal sphere holds a particle detector called a scintillator. Uncovering the dark side of the Universe 2013-02-06T03:58:26Z In other words, even with the benefit of a world-class proton accelerator and a mammoth particle detector, neutrino-based communication is far from efficient. Message Encoded in Neutrino Beam Transmitted through Solid Rock 2012-03-16T13:45:00.210Z It consists of a particle source, a particle detector, and two paths to get from one to the other. Could Simple Experiments Reveal the Quantum Nature of Spacetime? 2012-02-02T15:45:22.977Z It also hosts astronomical platforms, including the Alpha Magnetic Spectrometer particle detector. NASA clears SpaceX for trial run to space station 2011-12-09T22:25:13Z It explicitly allocates no money for the construction of a gigantic particle detector known as the Long-Baseline Neutrino Experiment. Senate Budget Bill Holds Energy Department Science Level 2011-09-09T20:20:02Z The primary goal of Endeavour's flight, the 134th in shuttle program history, was to deliver the $2 billion Alpha Magnetic Spectrometer particle detector and a pallet of spare parts to the station. Shuttle Endeavour lands after its final flight 2011-06-01T18:54:40Z The primary goal of Endeavour's flight, the 134th in shuttle program history, was to deliver the station's premier science experiment, the $2 billion Alpha Magnetic Spectrometer particle detector. Shuttle crew prepares for Florida homecoming 2011-05-31T06:00:41Z Endeavour delivered the station's premier science experiment -- the $2 billion Alpha Magnetic Spectrometer particle detector -- and a pallet of spare parts intended to tide over the orbital outpost after the shuttle program ends. Shuttle leaves space station to begin trip home 2011-05-30T04:42:01Z The shuttle delivered the station's premiere science experiment, the $2 billion Alpha Magnetic Spectrometer particle detector, and spare parts. Shuttle program's last spacewalk begins 2011-05-27T05:30:00Z The primary goal of the mission, which began on May 16, was to deliver the $2 billion Alpha Magnetic Spectrometer particle detector and spare parts for the station. Russia's parting gift to NASA: Shuttle legacy photo 2011-05-23T08:13:59Z Endeavour, which carried the $2 billion Alpha Magnetic Spectrometer particle detector and spare parts to the station, is due back at the Kennedy Space Center in Florida on June 1. Shuttle spacewalkers tackle station maintenance 2011-05-22T07:19:37Z Endeavour arrived at the space station on Wednesday to deliver the $2 billion Alpha Magnetic Spectrometer particle detector and spare parts. Astronauts offer pope unique view of Earth's woes 2011-05-21T15:10:05Z Endeavour carries the $2 billion Alpha Magnetic Spectrometer particle detector, a collaborative project of 600 physicists in 60 research organizations that is spearheaded by Nobel laureate Samuel Ting of the Massachusetts Institute of Technology. NASA fueling shuttle for launch Monday 2011-05-16T12:07:20Z The shuttle will be carrying a $2 billion Alpha Magnetic Spectrometer particle detector and spare parts to the space station. Shuttle launch slips again, no earlier than May 16 2011-05-06T20:36:58Z The shuttle is carrying a $2 billion Alpha Magnetic Spectrometer particle detector and a pallet of spare parts to the space station. Space shuttle launch target pushed back to May 10 2011-05-02T23:10:48Z Endeavour's last flight is devoted to outfitting the space station, a $100 billion project of 16 nations, with its highest profile science instrument, a $2 billion particle detector called the Alpha Magnetic Spectrometer. Shuttle fueled for launch attempt on Friday 2011-04-29T11:26:09Z The primary purpose of the flight is to deliver the $2 billion Alpha Magnetic Spectrometer, or AMS, particle detector, an instrument designed to detect dark matter, antimatter and other exotic phenomena. NASA clears shuttle Endeavour for April 29 launch 2011-04-19T21:42:54Z The shuttle will be delivering a $2 billion particle detector called the Alpha Magnetic Spectrometer to be mounted outside the space station in the second-to-last mission for NASA's shuttle program. NASA delays launch date for space shuttle Endeavour 2011-04-04T15:08:33Z The shuttle will be delivering the $2 billion Alpha Magnetic Spectrometer particle detector to the International Space Station, along with a pallet of spare parts. Astronaut hopes Giffords will be at shuttle launch 2011-03-24T22:57:00Z Endeavour is scheduled to deliver the $2 billion Alpha Magnetic Spectrometer particle detector to the International Space Station. Space shuttle worker killed in fall at U.S. launchpad 2011-03-14T20:16:37Z On April 19, the shuttle Endeavour is scheduled to launch with the station's highest-profile and most expensive science experiment -- the $2 billion Alpha Magnetic Spectrometer particle detector. Shuttle Discovery prepares for last landing 2011-03-08T20:18:50Z The shuttle is due to carry a $2 billion Alpha Magnetic Spectrometer particle detector to the station. Astronauts venture outside station for spacewalk 2011-02-28T23:03:48Z Shuttle Endeavour is set to launch April 19 with the $2 billion Alpha Magnetic Spectrometer particle detector. Shuttle Discovery ascends into space one last time 2011-02-25T00:13:26Z In particular, the board balked at the projected $480 million cost of the lab's infrastructure, especially when the biggest project in the lab would be a gigantic particle detector built by DOE. NSF and Energy Department Agree to Keep Pumps on for Underground Lab Site 2011-02-22T22:37:18Z Endeavour is scheduled to carry the $2 billion Alpha Magnetic Spectrometer particle detector to the International Space Station. Giffords' husband to command space shuttle flight 2011-02-05T00:23:00Z The space station, a $100 billion project of 16 nations, is due to be finished in February with the arrival of a $2 billion particle detector known as the Alpha Magnetic Spectrometer. NASA showdown looms as shuttle workers face layoffs 2010-09-27T23:42:00Z Sister ship Endeavour, carrying the $1.5 billion Alpha Magnetic Spectrometer particle detector, is set to fly on Feb. 26. Chicago Mayor Daley plans strict handgun law 2010-07-02T04:00:00Z Sister ship Endeavour, carrying the $1.5 billion Alpha Magnetic Spectrometer particle detector, is now set to fly on February 26 on the program's 134th and final mission. NASA delays shuttle finale until 2011 2010-07-01T21:29:00Z Endeavour, which will carry the $2 billion Alpha Magnetic Spectrometer particle detector to the station, is scheduled to be the program's finale in November. Space shuttle Atlantis lands in Florida 2010-05-26T12:59:00Z Endeavour, on NASA's 134th shuttle flight, will mark the program's finale with the delivery of the $2 billion Alpha Magnetic Spectrometer particle detector. NASA astronauts attach new room to space station 2010-05-18T15:24:00Z Endeavour is due to launch in November carrying a $2 billion, multinational particle detector known as the Alpha Magnetic Spectrometer. Shuttle Atlantis fueled for its last planned launch 2010-05-14T11:10:00Z |
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