英语词汇“deuterium”造句的方法、技巧、例句及翻译-英语例句辞典

Finally, the lab was exploiting the advantages that made it unique: in this case, Lewis’s large supply of deuterium combined with the high energies produced by the cyclotron. Big Science 2015-07-07T00:00:00Z

The neutron and deuterium were both discoveries from that miraculous year of 1932, when nuclear physics gave up some of its greatest secrets. Big Science 2015-07-07T00:00:00Z

His discovery was a triumph of scientific deduction, for the neutron, which gives deuterium its additional weight, was not discovered until many months after he identified the isotope itself. Big Science 2015-07-07T00:00:00Z

Tritium could be created by bombarding deuterium with copious neutrons in a heavy- water reactor. Big Science 2015-07-07T00:00:00Z

One limitation is that JT-60SA will only use hydrogen and its isotope deuterium in its experiments, not tritium—a third form of hydrogen that is expensive, scarce, and radioactive. First plasma fired up at world’s largest fusion reactor 2023-10-31T04:00:00Z

The facility will generate neutrons by focusing an intense beam of deuterium nuclei on a lithium target. News at a glance: Endangered plants, diversity in clinical trials, and testing fusion reactor walls 2023-10-11T04:00:00Z

That includes different types of uranium as well as deuterium, a hydrogen isotope that, in large amounts, could be used in reactors to make tritium, a nuclear weapons component. US tightens export controls of nuclear power items to China 2023-08-18T04:00:00Z

But in 2014 data from the European Space Agency's Rosetta mission showed that many comets' isotopic ratio is way off—they have far more deuterium than terrestrial water does. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z

If scientists can contain the fuel for fusion—a plasma mixture of deuterium and tritium, two heavy isotopes of hydrogen—the energy released in the reaction can make it self-sustaining. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z

Inside the capsule sits a frozen pellet of the hydrogen isotopes deuterium and tritium. This Pioneering Nuclear-Fusion Lab Is Gearing up to Break More Records 2023-04-28T04:00:00Z

Now, in a new study published in Nature, scientists have managed to spot quantum tunneling in what classical physics would deem an impossible reaction between hydrogen molecules and deuterium ions—heavy, charged versions of hydrogen. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z

Most experimental fusion reactors use the hydrogen isotopes deuterium and tritium. News at a glance: Monkey shipments, a controversial visa, and support for geoengineering research 2023-03-01T05:00:00Z

Many scientists maintain, however, that these molecules' deuterium ratio is far too low. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z

The world has abundant deuterium: this isotope constitutes 0.016 percent of natural hydrogen, so the seas are literally awash in it. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z

“It’s burning deuterium,” he says, referring to a hydrogen isotope that achieves starlight-powering nuclear fusion at lower temperatures than normal hydrogen. JWST Heralds a New Dawn for Exoplanet Science 2023-01-23T05:00:00Z

This happens when the three atoms of a hydrogen molecule and deuterium ion approach one another in a line, and one hydrogen atom hops over to bond with the deuterium instead. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z

Finally, while one part of the fuel, deuterium, is naturally abundant in sea water, tritium is much rarer. Why fusion ignition is being hailed as a major breakthrough in fusion – a nuclear physicist explains 2023-01-02T05:00:00Z

Hydrogen exists on Earth in two stable “flavors,” called isotopes: regular hydrogen, which has a single proton for its nucleus, and deuterium, whose nucleus is made of one proton and one neutron. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z

Instead of using a large amount of plasma confined by magnetic fields, the NIF experiment ignites a tiny target of deuterium and tritium. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z

The energy is converted to X-rays that compress and heat hydrogen isotopes called deuterium and tritium in the fuel capsule. See how lasers led to a nuclear fusion milestone

The reaction between hydrogen gas and deuterium ions is simple enough that it’s possible to predict the reaction rate with quantum mechanics alone. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z

The cylinder, heated to some 5.4 million degrees Fahrenheit, vaporizes, generating an implosion of X-rays, which in turn heats and compresses a BB-size pellet of frozen deuterium and tritium, two heavier forms of hydrogen. Major Fusion Energy Breakthrough to Be Announced by Scientists 2022-12-12T05:00:00Z

Water found in the mantle has about 15 percent less deuterium than seawater; that extra seawater deuterium most likely came from somewhere else. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z

Research involved people drinking a glass of water in which some of the hydrogen molecules were replaced by a stable isotope of the element called deuterium. Scientists say eight glasses of water a day may be too much 2022-11-25T05:00:00Z

A fusion power plant would be fueled with a mix of the hydrogen isotopes deuterium and tritium, which react most readily. Twisty device explores alternative path to fusion 2022-09-06T04:00:00Z

In the reaction, a molecule of hydrogen gas collides with one deuterium ion to produce a hydrogen ion and a heavy, deuterium-containing hydrogen molecule. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z

Note that deuterium has Z = N , which should tend to make it more tightly bound, but both are odd numbers. College Physics for AP Courses 2015-08-12T00:00:00Z

In a naturally occurring sample of hydrogen, there is one atom of deuterium for every 7000 H atoms and one atom of radioactive tritium for every 1018 H atoms. Chemistry 2019-02-14T00:00:00Z

The rate of elimination of the extra deuterium shows how quickly water in the body is turning over. Scientists say eight glasses of water a day may be too much 2022-11-25T05:00:00Z

Research machines like W7-X that aren’t trying to generate energy avoid radioactive tritium and stick to safer, more plentiful hydrogen or deuterium. Twisty device explores alternative path to fusion 2022-09-06T04:00:00Z

At temperatures that cold, the hydrogen and deuterium lacked the energy to react without tunneling. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z

To find the total energy released, we must find the number of deuterium and tritium atoms in a kilogram. College Physics for AP Courses 2015-08-12T00:00:00Z

Elemental deuterium and tritium have lower vapor pressure than ordinary hydrogen. Chemistry 2019-02-14T00:00:00Z

Determinations of the abundances of deuterium, helium, and lithium based on nearby stars and galaxies were used to put limits on how much ordinary matter is in the universe. Astronomy 2016-10-13T00:00:00Z

The firm hopes to initially develop a reactor that will fuse just cheap, abundant deuterium, to generate not power, but neutrons for manufacturing radioisotopes. Twisty device explores alternative path to fusion 2022-09-06T04:00:00Z

Tunneling occurred only about one in every 100 billion collisions between hydrogen and a deuterium ion, which agrees very well with Kokoouline and Yuen’s theoretical calculations. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z

Neutrons and γ rays transmit energy to the fusion fuel, create tritium from deuterium, and heat and compress the fusion fuel. College Physics for AP Courses 2015-08-12T00:00:00Z

When tritium is combined at high temperatures with its sibling deuterium, the two gases can burn like the Sun. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z

Heavy water instead contains two deuterium atoms and one oxygen atom, and incoming neutrinos can occasionally break up the loosely bound proton and neutron that make up the deuterium nucleus. Astronomy 2016-10-13T00:00:00Z

It wasn’t practical, using far more energy than it ever delivered from the deuterium fusion process, but it did successfully produce some light. Drone-maker new to Seattle aims to protect people here and in Ukraine 2022-06-05T04:00:00Z

The Nuclear Regulatory Commission will also halt general licenses for exports of source material, special material, byproduct material and deuterium to Russia. Group of Seven issues new sanctions against Russia over Ukraine invasion 2022-05-08T04:00:00Z

Attempts to utilize controlled fusion as an energy source on Earth are related to deuterium and tritium, and the reactions play important roles. College Physics for AP Courses 2015-08-12T00:00:00Z

ITER’s first experiments will use hydrogen and deuterium and produce no net energy. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z

Note that hydrogen containing one proton and one neutron is given its own name: deuterium. Astronomy 2016-10-13T00:00:00Z

When plants lose water to evaporation in dry weather, their leaves become enriched in a heavy hydrogen isotope, deuterium. Greenland’s Vikings may have vanished because they ran out of water 2022-03-22T04:00:00Z

TAE's "Norman" device powers its reactions with "regular" hydrogen and deuterium - a more benign, if less potent choice. Fusion race kicked into high gear by smart tech 2022-02-09T05:00:00Z

The second promising technique aims multiple lasers at tiny fuel pellets filled with a mixture of deuterium and tritium. College Physics for AP Courses 2015-08-12T00:00:00Z

But occasionally, a deuterium nucleus does capture a neutron and is transformed into tritium. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z

Objects with less than 13 MJ do not fuse deuterium and are usually considered planets. Astronomy 2016-10-13T00:00:00Z

By measuring the deuterium content of leaf remains from layers in the lake mud, the researchers found that southern Greenland’s climate became progressively drier during the Norse period, as they report today in Science Advances. Greenland’s Vikings may have vanished because they ran out of water 2022-03-22T04:00:00Z

Most fusion reactors run on ordinary hydrogen or deuterium, which allows them to explore the behavior of plasmas while avoiding the complications of tritium, which is both radioactive and scarce. European fusion reactor sets record for sustained energy 2022-02-09T05:00:00Z

There are equal numbers of deuterium and tritium nuclei in the mixture. College Physics for AP Courses 2015-08-12T00:00:00Z

Some say fusion reactors could create their own startup tritium by running on deuterium alone. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z

Deuterium can only provide an estimate of the density of ordinary matter because the abundance of deuterium is determined by the particles that interact to form it, namely protons and neutrons alone. Astronomy 2016-10-13T00:00:00Z

The usual fuel for producing controlled fusion in reactors consists of a mix of the heavy hydrogen isotopes deuterium and tritium, which may unite to make helium. U.S. Project Reaches Major Milestone toward Practical Fusion Power 2022-02-02T05:00:00Z

First, they had to revive the reactor’s tritium-handling facilities, not used for 2 decades, which extract unburned tritium and deuterium ions from waste gas after each shot and recycle them. European fusion reactor sets record for sustained energy 2022-02-09T05:00:00Z

Yet the average backyard swimming pool has about 6 kg of deuterium in it, so that fuel is plentiful if it can be utilized in a controlled manner. College Physics for AP Courses 2015-08-12T00:00:00Z

Many efforts cage a superhot plasma in a magnetic field; NIF uses a pulse from the world’s highest energy laser to compress a peppercorn-size capsule of the hydrogen isotopes deuterium and tritium. Science’s 2021 Breakthrough of the Year: AI brings protein structures to all 2021-12-15T05:00:00Z

Because dark matter particles do not affect the production of deuterium, measurement of the deuterium abundance cannot tell us how much dark matter exists. Astronomy 2016-10-13T00:00:00Z

The NIF team used 192 high-power lasers, all focused into a chamber called a hohlraum that is about the size and shape of a pencil’s eraser and contains the fuel capsule of deuterium and tritium. U.S. Project Reaches Major Milestone toward Practical Fusion Power 2022-02-02T05:00:00Z

A key ingredient the Germans needed to produce an atomic bomb was heavy water, which is water made of a hydrogen isotope called deuterium that has twice the mass of regular hydrogen. Did Nazis Produce These Uranium Cubes? Researchers Look for an Answer. 2021-09-10T04:00:00Z

But, it is only one-fourth the energy produced by the fusion of a kilogram mixture of deuterium and tritium as seen in Example 32.2. College Physics for AP Courses 2015-08-12T00:00:00Z

A fusion reactor, or tokamak, aims to capture the energy released when nuclei of deuterium and tritium, the heavy isotopes of hydrogen, fuse to produce helium and energetic neutrons. This powerful electromagnet could help make fusion energy a reality 2021-09-08T04:00:00Z

With this assumption, the model then accounts for the existence and structure of the CMB; the abundances of the light elements deuterium, helium, and lithium; and the acceleration of the expansion of the universe. Astronomy 2016-10-13T00:00:00Z

Heavy water is a rarer version of H2O in which ordinary hydrogen has been replaced with deuterium—that is, with hydrogen atoms bearing an extra neutron. NASA Just Broke the ‘Venus Curse’: Here’s What It Took 2021-08-17T04:00:00Z

Heavy water is a rarer version of the far more commonplace H2O, or normal water, in which ordinary hydrogen has been replaced with deuterium—that is, with hydrogen atoms bearing an extra neutron. Is NASA about to Lift the ‘Venus Curse?’ 2021-06-02T04:00:00Z

The energy produced by the fusion of a 1.00-kg mixture of deuterium and tritium was found in Example Calculating Energy and Power from Fusion. College Physics for AP Courses 2015-08-12T00:00:00Z

On Earth, about one in 5,000 hydrogen atoms is a version known as deuterium that is twice as heavy because its nucleus contains both a neutron and a proton. The Water on Mars Vanished. This Might Be Where It Went. 2021-03-19T04:00:00Z

However, these objects would be made of ordinary matter, and the deuterium abundance tells us that no more than 5% of the critical density consists of ordinary matter. Astronomy 2016-10-13T00:00:00Z

In studies of Apollo Moon rocks, Desch and his colleagues measured the ratios of hydrogen to deuterium, a heavier hydrogen isotope. Remains of impact that created the Moon may lie deep within Earth 2021-03-23T04:00:00Z

Writing in Nature, Rau et al.1 report an astonishingly precise measurement of the mass of the deuteron — the nucleus of a hydrogen isotope called deuterium. Precise measurement of deuteron mass raises hopes of solving the nuclear-mass puzzle 2020-09-01T04:00:00Z

You must estimate or look up the amount of water in the oceans and take the deuterium content to be 0.015% of natural hydrogen to find the mass of deuterium available. College Physics for AP Courses 2015-08-12T00:00:00Z

But on Mars, the concentration of deuterium is markedly higher, about one in 700. The Water on Mars Vanished. This Might Be Where It Went. 2021-03-19T04:00:00Z

Since these particles do not participate in nuclear reactions leading to the production of deuterium, the deuterium abundance puts no limits on how many WIMPs might be in the universe. Astronomy 2016-10-13T00:00:00Z

The plasma is made of deuterium, a heavier isotope of hydrogen, and the goal is to bring it to temperatures and pressures at which colliding nuclei can fuse to form helium. After decades of decline, the U.S. national fusion lab seeks a rebirth 2020-02-06T05:00:00Z

Figure 1 | The importance of nuclear masses for physics research. a, The rotating molecule HD+ comprises a deuteron — the nucleus of a hydrogen isotope called deuterium — and a proton. Precise measurement of deuteron mass raises hopes of solving the nuclear-mass puzzle 2020-09-01T04:00:00Z

Third, the universe contains large amounts of deuterium and helium, as it should if temperatures were once much higher. Making Sense of Modern Cosmology 2019-10-10T04:00:00Z

They set the temperature to -263 degrees Celsius and attached two deuterium discharge lamps to the chamber to cause the chemical reactions. Building blocks of life may have come from deep space: 'Key to unraveling fundamental questions for humankind' 2019-09-30T04:00:00Z

Next, fusion reactions produced deuterium, helium, and lithium nuclei. Astronomy 2016-10-13T00:00:00Z

Replacing some of the deuterium with tritium, an even heavier isotope of hydrogen, could make the reactions self-sustaining. After decades of decline, the U.S. national fusion lab seeks a rebirth 2020-02-06T05:00:00Z

Water that forms in very cold interplanetary or interstellar environments is thought to incorporate more of the heavy deuterium than in warmer conditions. Planet Plates, Metal Moon and Comet Cocktails 2019-06-15T04:00:00Z

And, by this logic, replacing hydrogen with the heavier isotope deuterium should lower the critical temperature. Superconductivity near room temperature 2019-05-21T04:00:00Z

Some models suggest the abundance of deuterium grows linearly moving away from the sun; others suggest the abundance shrinks under those same circumstances. Hyperactive Comets Hint at Origins of Earth's Oceans 2019-05-09T04:00:00Z

Measurements of the deuterium abundance in today’s universe show that the total amount of ordinary matter in the universe is only about 5% of the critical density. Astronomy 2016-10-13T00:00:00Z

Hydrogen’s cousins, deuterium and tritium, called heavy hydrogen, have been used to make hydrogen bombs. Lightweight of periodic table plays big role in life on Earth 2019-03-17T04:00:00Z

In Jackson’s case that meant combining two atoms of deuterium gas in the fusion reactor’s plasma core which ejected a neutron into a device that slowed it down and detected nuclear fusion. Teen builds working nuclear fusion reactor in Memphis home 2019-02-19T05:00:00Z

The current experiment used 168 of the lasers at a lower setting to set off a series of reverberating shock waves through ultracool liquid deuterium. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z

Several that seek to replicate the chaotic, turbulent mixing of material in the early solar system predict deuterium abundances varying wildly at different points for no discernible reason. Hyperactive Comets Hint at Origins of Earth's Oceans 2019-05-09T04:00:00Z

In addition to the positron, the fusion of two hydrogen atoms to form deuterium results in the emission of a neutrino. Astronomy 2016-10-13T00:00:00Z

Unlike gassy worlds such as Jupiter, brown dwarfs are heavy enough to faintly shine by burning deuterium, a stable chemical form of hydrogen. It's Full of Stars: New 3-D Milky Way Map Could Settle Debate over Who Discovered the First Exoplanet 2018-04-20T04:00:00Z

Chuzhoy, L. & Shapiro, P. R. Ultraviolet pumping of hyperfine transitions in the light elements, with application to 21 cm hydrogen and 92 cm deuterium lines from the early universe. Possible interaction between baryons and dark-matter particles revealed by the first stars 2018-02-27T05:00:00Z

The researchers at both labs are preparing to run additional experiments, compressing hydrogen instead of deuterium. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z

The main fuels are deuterium and tritium, both rare but inexpensive forms of hydrogen. A Giant Nuclear Blast, but a Hydrogen Bomb? Too Soon to Say 2017-09-03T04:00:00Z

The challenge is keeping the deuterium and tritium—which will participate in fusion reactions—hot enough and dense enough, for a long enough time to produce energy. Astronomy 2016-10-13T00:00:00Z

Brown dwarfs, on the other hand, are heated from the inside-out, using deuterium fusion to reach similar temperatures and atmospheric chemistry. It's Full of Stars: New 3-D Milky Way Map Could Settle Debate over Who Discovered the First Exoplanet 2018-04-20T04:00:00Z

The deuterium provides a clear “fingerprint” for what plants contribute to the process, he says. Trees in the Amazon make their own rain 2017-08-04T04:00:00Z

That compressed the deuterium to a pressure that was 6 million times greater than atmospheric pressure while keeping temperatures to what the physicists regarded as cool: below 3,000 degrees Fahrenheit. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z

The fusion reactors that Princeton Satellite Systems is developing uses low-frequency radio waves to heat a mix of deuterium and helium-3, and magnetic fields to confine the resulting plasma in a ring. Could Tiny Fusion Rockets Revolutionize Spaceflight? 2017-06-12T04:00:00Z

How much energy is released when a proton combines with a deuterium nucleus to produce tritium, 3He? Astronomy 2016-10-13T00:00:00Z

Meanwhile any object less than 13 Jupiter masses should fail to trigger deuterium fusion and thus would be a planet. It's Full of Stars: New 3-D Milky Way Map Could Settle Debate over Who Discovered the First Exoplanet 2018-04-20T04:00:00Z

What’s more, the deuterium content was highest at the end of the Amazon’s dry season, during the “greening” period when photosynthesis was strongest. Trees in the Amazon make their own rain 2017-08-04T04:00:00Z

At Sandia National Laboratories in Albuquerque, intense bursts of magnetic fields were used to compress samples of deuterium, a heavier form of hydrogen. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z

The fuels were deuterium and tritium, rare forms of hydrogen. U.S. Nuclear History Offers Clues to North Korea’s Progress 2017-05-22T04:00:00Z

Isotopic analysis of deuterium in the water ejected by the comet shows that it is different from the water found on Earth. Astronomy 2016-10-13T00:00:00Z

Fusion bombs, in contrast, explode when light atoms like deuterium join together. Bikini Islanders Still Deal With Fallout of U.S. Nuclear Tests, 70 Years Later 2016-06-29T04:00:00Z

Early studies will use only hydrogen or deuterium for simplicity, leaving the radioactive tritium for later. Fusion megaproject confirms 5-year delay, trims costs 2016-06-16T04:00:00Z

JET is also the only tokamak in the world equipped to use the fuel that will eventually power ITER: a mix of the hydrogen isotopes deuterium and tritium. U.K.-E.U. fission could harm fusion research 2016-06-14T04:00:00Z

While comets, which form far out in the solar system, carry water rich in deuterium, water formed nearer the sun is richer in hydrogen. Water inside moon mostly from asteroids, study suggests 2016-05-31T04:00:00Z

The International Astronomical Union considers the distinctive feature to be deuterium fusion. Astronomy 2016-10-13T00:00:00Z

In 1993, the laboratory’s immense Tokamak Fusion Test Reactor began a series of runs using a mix of deuterium and tritium, two heavier forms of hydrogen. Ronald C. Davidson, Pioneer of Fusion Power, Dies at 74 2016-05-29T04:00:00Z

Injecting tritium and deuterium, the heavier hydrogen isotopes, and achieving fusion would happen several years later. US advised to stick with troubled fusion project ITER 2016-05-25T04:00:00Z

JET researchers are currently testing how the machine behaves when filled with hydrogen, deuterium, and tritium individually before attempting deuterium-tritium burns in 2019. U.K.-E.U. fission could harm fusion research 2016-06-14T04:00:00Z

The idea is to use intense magnetic fields to trap an ultrahot plasma of deuterium and tritium nuclei in a huge donut-shaped vacuum chamber. U.S. should stick with troubled ITER fusion project, secretary of energy recommends 2016-05-26T04:00:00Z

The fusion of deuterium can happen at a lower temperature than the fusion of hydrogen. Astronomy 2016-10-13T00:00:00Z

This is a conventional fission bomb that contains a small quantity of the hydrogen isotopes tritium and deuterium, which fuse to release extra neutrons that greatly boost the fission reaction and explosive yield. What kind of bomb did North Korea detonate? 2016-01-07T05:00:00Z

What North Korea probably did was test a “boosted” device that uses a gas of deuterium and tritium, two hydrogen isotopes. North Korea is a joke. And that’s the problem. 2016-01-08T05:00:00Z

The enormous heat released when the fusion explosion goes off within the bomb compresses a core fuel of hydrogen—specifically the hydrogen isotopes deuterium and tritium. Here's the Difference Between a Hydrogen Bomb and an Atom Bomb 2016-01-06T05:00:00Z

They will use deuterium, a heavier type, or isotope, of the element. German plasma success raises nuclear fusion hopes - BBC News 2015-12-11T05:00:00Z

The amount of deuterium that can be produced in the first 4 minutes of creation depends on the density of the universe at the time deuterium was formed. Astronomy 2016-10-13T00:00:00Z

In order to work, it relied on a fission explosion that would trigger fusion in liquid deuterium, a heavy hydrogen isotope. What the First H-Bomb Test Looked Like 2015-11-02T05:00:00Z

By far the most popular answer is deuterium and tritium, two isotopes of hydrogen. Inside the Quest for Fusion, Clean Energy’s Holy Grail 0002-11-29T05:00:00Z

Rain that falls during dry periods is rich in deuterium, a heavy isotope of hydrogen. Ocean sediments suggest dry future for Horn of Africa 2015-10-08T04:00:00Z

Adding a neutron, to create deuterium, doubles the mass. Drugs that live long will prosper 2015-09-03T04:00:00Z

If the density were relatively high, nearly all the deuterium would have been converted into helium through interactions with protons, just as it is in stars. Astronomy 2016-10-13T00:00:00Z

A 10-fold increase in temperature would bring them into the realm of sparking reactions in conventional fusion fuel, a mixture of the hydrogen isotopes deuterium and tritium, known as D-T. Secretive fusion company makes reactor breakthrough 2015-08-24T04:00:00Z

This is fusion’s low-hanging fruit, because deuterium and tritium fuse at a lower temperature than any other option, a comparatively mild 100 million degrees Celsius. Inside the Quest for Fusion, Clean Energy’s Holy Grail 0002-11-29T05:00:00Z

Leaf waxes that contain higher levels of deuterium thus signal dry spells. Ocean sediments suggest dry future for Horn of Africa 2015-10-08T04:00:00Z

For instance, the bonds deuterium forms with carbon atoms are stronger than those formed between carbon and normal hydrogen. Drugs that live long will prosper 2015-09-03T04:00:00Z

The amount of deuterium we see today thus gives us a clue to the density of the universe when it was about 4 minutes old. Astronomy 2016-10-13T00:00:00Z

The project's aim is to fuse two isotopes of hydrogen — tritium and deuterium — to deliver a powerful, clean source of electricity. Nuclear physics: Pull together for fusion 2015-06-08T04:00:00Z

By contrast … the lithium from a single laptop battery and the deuterium from 45 liters of water could generate enough electricity using fusion to supply an average U.K. consumer’s energy needs for 30 years.” Inside the Quest for Fusion, Clean Energy’s Holy Grail 0002-11-29T05:00:00Z

The atmosphere of Mars contains eight times more deuterium that Earth’s. Vast Ocean Once Covered Mars’ Surface, NASA Study Shows 2015-03-06T05:00:00Z

Add some deuterium, then, and a drug may last longer. Drugs that live long will prosper 2015-09-03T04:00:00Z

Theoretical models can relate the density then to the density now; thus, measurements of the abundance of deuterium today can give us an estimate of the current density of the universe. Astronomy 2016-10-13T00:00:00Z

By looking at the levels of the heavier hydrogen isotope deuterium and comparing the ratio to the lighter hydrogen, scientists can work out the history of a planet’s water. Mysterious Methane Spike Provides Tantalising Clue To Life On Mars 2014-12-16T05:00:00Z

It’s all H2O, but some of the H is a rare form of hydrogen known as deuterium, whose atoms carry not just a proton like the ordinary stuff, but a neutron as well. Dying for a Drink: How the Earth Got its Water 2014-12-11T05:00:00Z

When studying the northern and southern poles of Mars, researchers discovered large quantities of deuterium. Vast Ocean Once Covered Mars’ Surface, NASA Study Shows 2015-03-06T05:00:00Z

On Earth, three in 10,000 water molecules have the heavy hydrogen isotope deuterium. Rosetta shows Earth's water did not come from comets: study 2014-12-10T05:00:00Z

The measurements of deuterium indicate that the present-day density of ordinary matter—protons and neutrons—is about 5 × 10–28 kg/m3. Astronomy 2016-10-13T00:00:00Z

While the vast majority of liquid on our planet is made up of hydrogen and oxygen atoms, very occasionally a hydrogen atom will be replaced with a deuterium atom. Comets 'not source of Earth's water' 2014-12-10T05:00:00Z

But on the Churyumov-Gerasimenko comet that Rosetta is orbiting, the ratio is even higher, with deuterium molecules present at three times the concentration that they appear on Earth. Scientists no longer think Earth's water originated on comets 2014-12-10T05:00:00Z

Ultra-dense deuterium, an isotope of hydrogen, is found in the earth's oceans, and tritium is made from natural lithium deposits. Lockheed says makes breakthrough on fusion energy project 2014-10-16T04:00:00Z

Ultra-dense deuterium, an isotope of hydrogen, is found in the earth’s oceans, and tritium is made from natural lithium deposits. Lockheed announces breakthrough on nuclear fusion energy 2014-10-15T04:00:00Z

From the abundance of deuterium, we know that not enough protons and neutrons are present, by a factor of about 20, to produce a critical-density universe. Astronomy 2016-10-13T00:00:00Z

There is already evidence from the Herschel Space Observatory that at least some comets carry water with the same ratio of hydrogen to its heavier isotope, deuterium, as the water in Earth's oceans. Kuiper Belt Missions Could Reveal the Solar System’s Origins 2014-10-15T04:00:00Z

This is because these clouds are subject to the continuous bombardment of cosmic rays, which tend to favour the inclusion of deuterium. Earth has water older than the Sun 2014-09-25T04:00:00Z

So far, he says, Tri Alpha has run its C-2 only with deuterium, and it is a long way from achieving the extreme plasma conditions needed to burn its ultimate fuel. Plasma physics: The fusion upstarts 2014-07-22T04:00:00Z

While running the experiment in this mode allows scientists to gather valuable scientific knowledge, both deuterium and tritium will be needed to exceed the record set by the Oxfordshire facility 17 years ago. UK team to shoot for fusion record 2014-04-24T09:38:27Z

Protons, deuterium, helium, and some lithium were produced in the initial fireball. Astronomy 2016-10-13T00:00:00Z

The pellet contains a layer of carefully frozen deuterium and tritium, the heavier forms of hydrogen, and in a brief moment — about one ten-billionth of a second — the imploding atoms fuse together. The Challenge: How to Keep Fusion Going Long Enough 2014-03-17T21:12:10Z

But the biggest irony of all is that this is workable only for a deuterium/tritium target. Do We Really Need Nuclear Fusion for Power? 2014-02-13T08:10:00Z

The company hopes that its reactor could eventually reach the hotter conditions needed to fuse deuterium with helium-3, another combination that produces only α-particles and protons, with no neutron by-products. Plasma physics: The fusion upstarts 2014-07-22T04:00:00Z

The Livermore scientists made progress by changing the shape of the laser pulses to heat the hydrogen – a mix of two heavier isotopes known as deuterium and tritium – somewhat more gently. Giant Laser Complex Makes Fusion Advance, Finally 2014-02-12T21:44:23Z

In such a future Red Giant scenario, Sion says Jupiter may accrete enough mass to turn into a deuterium or even hydrogen burning star. Nearest Dying White Dwarfs Likely Still Harbor Planets 2014-01-29T23:07:00Z

And so, while still working on crystallization on the side, she tried an alternative technique — hydrogen–deuterium exchange mass spectrometry. Structural biology: More than a crystallographer 2014-01-29T18:51:49.908Z

He solved that complication by replacing some of the hydrogen atoms with heavier versions known as deuterium and tritium so that they were no longer identical to the others. John W. Cornforth, 96, Nobel-Winning Chemist, Dies 2013-12-20T04:16:03Z

SHINE's technology uses a linear accelerator to slam deuterium ions into tritium gas, producing helium and neutrons. Radioisotopes: The medical testing crisis 2013-12-11T18:50:32.531Z

Scientists plan to compare Maven’s measurements of the current ratio of deuterium with hydrogen in the atmosphere to the ratio bound up in eons-old rocks on the Martian surface. NASA Probe to Track Mars s Missing Atmosphere 2013-11-14T11:45:00.373Z

Inside is a tiny pellet of deuterium and tritium. Pressure for Results Mounts as Fusion Research Crawls Forward 2013-10-16T19:15:00.427Z

It is also the only tokamak currently equipped to operate with a full fusion fuel made of an equal mixture of the hydrogen isotopes deuterium and tritium. Europe's JET Set Ponders Future of World's Largest Fusion Reactor 2013-07-03T22:33:33Z

He then followed where the deuterium and tritium atoms went during the molecular dance. John W. Cornforth, 96, Nobel-Winning Chemist, Dies 2013-12-20T04:16:03Z

Unlike ordinary hydrogen, with just a proton in its nucleus, deuterium also contains a neutron. Earth's Great Gift to the Moon: Water 2013-05-10T10:55:00Z

The $671-million also carries an ultraviolet spectrograph to map global trends in the planet’s thin upper atmosphere as well as an instrument to detect neutral gas—especially a chemical called deuterium. NASA Probe to Track Mars s Missing Atmosphere 2013-11-14T11:45:00.373Z

But it may burn to some degree, using a heavy isotope of hydrogen called deuterium as fusion fuel. Astronomer Locates Previously Unseen Neighbor to the Sun 2013-03-11T19:45:09.367Z

Specifically, experimenters found regular musk molecules smelled different from ones that contain deuterium. Study Bolsters Quantum Vibration Scent Theory 2013-01-28T08:45:00.193Z

One way to test the idea was to prepare two molecules of identical shape but with different vibrations - done by replacing a molecule's hydrogen atoms with their heavier cousins called deuterium. 'Quantum smell' idea gains ground 2013-01-28T00:05:05Z

The analysis shows that the Martian water vapour contains five times as much deuterium than that found in typical Earth water. Rover's big lab up and running 2012-12-04T02:50:53Z

As 500 terawatts of laser power hits the capsule, it generates X-rays that blast into the pellet, causing the atoms of deuterium and tritium inside to fuse. Laser lab shifts focus to warheads 2012-11-07T18:20:40.347Z

A small capsule of deuterium and tritium a few millimeters in diameter resides inside a larger chamber of a few centimeters in size. Dot Earth Blog: Exploring whether fusion energy research is still worth the cost comp 2012-10-18T21:24:25Z

Before the year is out, scientists at the National Ignition Facility in California hope to fire the world’s most powerful laser into a small test chamber with pea-sized fuel pellets of deuterium and tritium inside. Stop Building Bombs and Start Building Starships 2012-10-08T19:45:06.687Z

The target in MagLIF is a tiny cylinder about 7 millimeters in diameter; it's made of beryllium and filled with deuterium and tritium. A Step Forward for Fusion 2012-09-18T16:45:00Z

Atoms of deuterium contain a neutron, whereas "normal" hydrogen atoms do not. Antarctica warming 'not unique' 2012-08-23T11:55:19Z

Carbon's big drawback is that it's very happy to absorb deuterium and tritium. How to Line a Thermonuclear Reactor 2012-08-16T20:51:00Z

That’s when it hit me that we could make a good case for an unambiguously designed message by transmitting molecules that have all or many of their hydrogen atoms replaced by deuterium. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

Rather, in theory, it fuses them together – the way the sun works – typically combining isotopes of hydrogen known as deuterium and tritium. Iranian team to collaborate with US company on nuclear fusion project 2012-05-25T17:59:25Z

Fusion reactors heat and squeeze a plasma—an ionized gas—composed of the hydrogen isotopes deuterium and tritium, compressing the isotopes until their nuclei overcome their mutual repulsion and fuse together. A Step Forward for Fusion 2012-09-18T16:45:00Z

When a warhead detonates, it squeezes the deuterium and tritium until they fuse together. Isotopes Hint at North Korean Nuclear Weapons Tests in 2010 2012-02-03T20:15:16.477Z

Near the point of maximum compression, the deuterium nuclei in the centre would fuse, releasing a burst of neutrons that would trigger the nuclear explosion. Iran?s nuclear plan revealed 2011-11-16T18:20:26.600Z

The problem with deuterium is that it might be hard to detect against the abundant background of normal hydrogen. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

Fusion gave rise to the "too cheap to meter" vision in the 1950s, with the notion that a plentiful supply of deuterium could inexpensively meet energy needs. Iranian team to collaborate with US company on nuclear fusion project 2012-05-25T17:59:25Z

One of the clouds also shows traces of deuterium, also known as heavy hydrogen, the nucleus of which contains not only a proton, as ordinary hydrogen does, but also a neutron. Fresh Start: Scientists Glimpse Unsullied Traces of the Infant Universe 2011-11-10T22:45:00.210Z

"For these two clouds, we clearly see multiple lines associated with the presence of hydrogen and, in one of the clouds, also lines associated with deuterium," hydrogen atoms with extra neutrons on board, Fumagalli says. Astronomers Spot the Universe's First Gas 2011-11-10T19:00:00Z

The core of the sphere would carry a small neutron initiator, possibly made of uranium and the heavy hydrogen isotope, deuterium. Iran?s nuclear plan revealed 2011-11-16T18:20:26.600Z

Another idea comes from the comments section of my original posts where some readers recommended transmitting radio signals at the frequency of deuterium itself or deuterated water. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

D/H measures the proportion of deuterium, or heavy hydrogen, to ordinary hydrogen. Chemical analysis of a comet?s ice gives a clue to source of water on Earth 2011-10-10T19:03:21Z

Specifically, the ratio of heavy hydrogen, or deuterium, to regular hydrogen was too high in the comets. New Evidence For Comet Sources Of Ocean Water 2011-10-10T17:45:00.217Z

Their spacecraft would be powered by tiny thermonuclear explosions caused by compressing pellets of deuterium and helium-3 with laser blasts. Life Out There: Offering Funds, U.S. Agency Dreams of Sending Humans to Stars 2011-08-18T03:30:43Z

The types of hydrogen that will be fused are called deuterium and tritium. Fusion Experiment Faces New Hurdles 2011-06-24T04:21:11Z

I propose therefore that the search for extraterrestrial intelligence should include the search for molecules enriched in deuterium, carbon-13 and minor isotopes of other elements in addition to more traditional signals like electromagnetic radiation. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

A polyhedral arrangement of electromagnetic coils traps electrons at its center, producing a potential well for positively charged ions such as deuterium. Projects in Profusion: A Skeptical Look at 3 Wild Fusion-Energy Schemes 2011-05-26T11:15:05.103Z

The disclosure about the atomic trigger centered on a rare material — uranium deuteride, a form of the element made with deuterium, or heavy hydrogen. Watchdog Finds Evidence That Iran Worked on Nuclear Triggers 2011-05-25T01:48:25Z

At the heart of the detection method is Wilson’s fusion reactor, which melds atoms of deuterium together and creates neutrons. Youthful Ingenuity Honored at Intel Science & Engineering Fair 2011-05-16T21:12:00Z

The next stage would be to build a device that generates neutrons by fusing deuterium, a hydrogen isotope. U.K. Start-Up Aims to Cash in on Small Fusion Reactor 2011-02-17T18:33:55Z

Hydrogen is the most abundant element in the universe but deuterium comprises 1 atom in about 6000 of hydrogen and amounts to only 0.02%, while tritium is even scarcer. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

In a fusion reaction, energy is released when light atomic nuclei - the hydrogen isotopes deuterium and tritium - are fused together to form heavier atomic nuclei. Fusion finance plan is rejected 2010-12-16T17:20:59Z

That's because comet water contains about twice as many deuterium atoms. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z

The oceans of the world contain sixty billion year's worth of deuterium. Energetic debate 2010-03-05T14:02:00Z

It contains a tiny pellet of fuel made from an isotope of hydrogen called deuterium. 2010-01-28T19:10:00Z

The molecule need not even be fully deuterated since even partial deuterium enrichment is very unlikely to occur naturally. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

Deuterons or alpha particles are obtained in a similar fashion using deuterium or helium gas in place of hydrogen. LRL Accelerators The 184-Inch Synchrocyclotron

While the high deuterium content in comets makes it unlikely that they were the primarily source of Earth's water, it doesn't rule out the Late Heavy Bombardment theory. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z

My analysis of the water samples shows a layer almost a foot deep of nearly pure deuterium. The Caves of Fear

The larger yield nuclear weapons derive a substantial part of their explosive force from the fusion of heavy forms of hydrogen--deuterium and tritium. Worldwide Effects of Nuclear War: Some Perspectives

Full replacement by deuterium however would cinch the evidence. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

It's possible, experts say, that the water-bearing bombs were some type of comet or meteorite with just the right deuterium and gas ratios. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z

Some meteorites contain water, and don't have an excess of deuterium, and during Earth's formation, some experts hypothesize, numerous such objects - some the size of small planets - were careening around the solar system. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z

Well, heavy water is made of one atom of oxygen plus two atoms of deuterium, which is the first isotope of hydrogen. The Caves of Fear

"It's true that one of the possibilities in building a hydrogen bomb concerns deuterium," the scientist said. The Caves of Fear

Fortunately we have several spectroscopic techniques to detect deuterium that include extremely sensitive mass spectrometry methods. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z

Then, for a considerably higher price, he would undertake to collect a sample of the deuterium they were using. The Caves of Fear

单词	deuterium
例句	deuterium Finally, the lab was exploiting the advantages that made it unique: in this case, Lewis’s large supply of deuterium combined with the high energies produced by the cyclotron. Big Science 2015-07-07T00:00:00Z The neutron and deuterium were both discoveries from that miraculous year of 1932, when nuclear physics gave up some of its greatest secrets. Big Science 2015-07-07T00:00:00Z His discovery was a triumph of scientific deduction, for the neutron, which gives deuterium its additional weight, was not discovered until many months after he identified the isotope itself. Big Science 2015-07-07T00:00:00Z Tritium could be created by bombarding deuterium with copious neutrons in a heavy- water reactor. Big Science 2015-07-07T00:00:00Z One limitation is that JT-60SA will only use hydrogen and its isotope deuterium in its experiments, not tritium—a third form of hydrogen that is expensive, scarce, and radioactive. First plasma fired up at world’s largest fusion reactor 2023-10-31T04:00:00Z The facility will generate neutrons by focusing an intense beam of deuterium nuclei on a lithium target. News at a glance: Endangered plants, diversity in clinical trials, and testing fusion reactor walls 2023-10-11T04:00:00Z That includes different types of uranium as well as deuterium, a hydrogen isotope that, in large amounts, could be used in reactors to make tritium, a nuclear weapons component. US tightens export controls of nuclear power items to China 2023-08-18T04:00:00Z But in 2014 data from the European Space Agency's Rosetta mission showed that many comets' isotopic ratio is way off—they have far more deuterium than terrestrial water does. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z If scientists can contain the fuel for fusion—a plasma mixture of deuterium and tritium, two heavy isotopes of hydrogen—the energy released in the reaction can make it self-sustaining. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z Inside the capsule sits a frozen pellet of the hydrogen isotopes deuterium and tritium. This Pioneering Nuclear-Fusion Lab Is Gearing up to Break More Records 2023-04-28T04:00:00Z Now, in a new study published in Nature, scientists have managed to spot quantum tunneling in what classical physics would deem an impossible reaction between hydrogen molecules and deuterium ions—heavy, charged versions of hydrogen. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z Most experimental fusion reactors use the hydrogen isotopes deuterium and tritium. News at a glance: Monkey shipments, a controversial visa, and support for geoengineering research 2023-03-01T05:00:00Z Many scientists maintain, however, that these molecules' deuterium ratio is far too low. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z The world has abundant deuterium: this isotope constitutes 0.016 percent of natural hydrogen, so the seas are literally awash in it. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z “It’s burning deuterium,” he says, referring to a hydrogen isotope that achieves starlight-powering nuclear fusion at lower temperatures than normal hydrogen. JWST Heralds a New Dawn for Exoplanet Science 2023-01-23T05:00:00Z This happens when the three atoms of a hydrogen molecule and deuterium ion approach one another in a line, and one hydrogen atom hops over to bond with the deuterium instead. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z Finally, while one part of the fuel, deuterium, is naturally abundant in sea water, tritium is much rarer. Why fusion ignition is being hailed as a major breakthrough in fusion – a nuclear physicist explains 2023-01-02T05:00:00Z Hydrogen exists on Earth in two stable “flavors,” called isotopes: regular hydrogen, which has a single proton for its nucleus, and deuterium, whose nucleus is made of one proton and one neutron. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z Instead of using a large amount of plasma confined by magnetic fields, the NIF experiment ignites a tiny target of deuterium and tritium. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z The energy is converted to X-rays that compress and heat hydrogen isotopes called deuterium and tritium in the fuel capsule. See how lasers led to a nuclear fusion milestone The reaction between hydrogen gas and deuterium ions is simple enough that it’s possible to predict the reaction rate with quantum mechanics alone. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z The cylinder, heated to some 5.4 million degrees Fahrenheit, vaporizes, generating an implosion of X-rays, which in turn heats and compresses a BB-size pellet of frozen deuterium and tritium, two heavier forms of hydrogen. Major Fusion Energy Breakthrough to Be Announced by Scientists 2022-12-12T05:00:00Z Water found in the mantle has about 15 percent less deuterium than seawater; that extra seawater deuterium most likely came from somewhere else. Did Earth’s Water Come from Meteorites? 2023-07-31T04:00:00Z Research involved people drinking a glass of water in which some of the hydrogen molecules were replaced by a stable isotope of the element called deuterium. Scientists say eight glasses of water a day may be too much 2022-11-25T05:00:00Z A fusion power plant would be fueled with a mix of the hydrogen isotopes deuterium and tritium, which react most readily. Twisty device explores alternative path to fusion 2022-09-06T04:00:00Z In the reaction, a molecule of hydrogen gas collides with one deuterium ion to produce a hydrogen ion and a heavy, deuterium-containing hydrogen molecule. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z Note that deuterium has Z = N , which should tend to make it more tightly bound, but both are odd numbers. College Physics for AP Courses 2015-08-12T00:00:00Z In a naturally occurring sample of hydrogen, there is one atom of deuterium for every 7000 H atoms and one atom of radioactive tritium for every 1018 H atoms. Chemistry 2019-02-14T00:00:00Z The rate of elimination of the extra deuterium shows how quickly water in the body is turning over. Scientists say eight glasses of water a day may be too much 2022-11-25T05:00:00Z Research machines like W7-X that aren’t trying to generate energy avoid radioactive tritium and stick to safer, more plentiful hydrogen or deuterium. Twisty device explores alternative path to fusion 2022-09-06T04:00:00Z At temperatures that cold, the hydrogen and deuterium lacked the energy to react without tunneling. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z To find the total energy released, we must find the number of deuterium and tritium atoms in a kilogram. College Physics for AP Courses 2015-08-12T00:00:00Z Elemental deuterium and tritium have lower vapor pressure than ordinary hydrogen. Chemistry 2019-02-14T00:00:00Z Determinations of the abundances of deuterium, helium, and lithium based on nearby stars and galaxies were used to put limits on how much ordinary matter is in the universe. Astronomy 2016-10-13T00:00:00Z The firm hopes to initially develop a reactor that will fuse just cheap, abundant deuterium, to generate not power, but neutrons for manufacturing radioisotopes. Twisty device explores alternative path to fusion 2022-09-06T04:00:00Z Tunneling occurred only about one in every 100 billion collisions between hydrogen and a deuterium ion, which agrees very well with Kokoouline and Yuen’s theoretical calculations. Bizarre Quantum Tunneling Observation Throws Out All the Rules 2023-04-04T04:00:00Z Neutrons and γ rays transmit energy to the fusion fuel, create tritium from deuterium, and heat and compress the fusion fuel. College Physics for AP Courses 2015-08-12T00:00:00Z When tritium is combined at high temperatures with its sibling deuterium, the two gases can burn like the Sun. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z Heavy water instead contains two deuterium atoms and one oxygen atom, and incoming neutrinos can occasionally break up the loosely bound proton and neutron that make up the deuterium nucleus. Astronomy 2016-10-13T00:00:00Z It wasn’t practical, using far more energy than it ever delivered from the deuterium fusion process, but it did successfully produce some light. Drone-maker new to Seattle aims to protect people here and in Ukraine 2022-06-05T04:00:00Z The Nuclear Regulatory Commission will also halt general licenses for exports of source material, special material, byproduct material and deuterium to Russia. Group of Seven issues new sanctions against Russia over Ukraine invasion 2022-05-08T04:00:00Z Attempts to utilize controlled fusion as an energy source on Earth are related to deuterium and tritium, and the reactions play important roles. College Physics for AP Courses 2015-08-12T00:00:00Z ITER’s first experiments will use hydrogen and deuterium and produce no net energy. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z Note that hydrogen containing one proton and one neutron is given its own name: deuterium. Astronomy 2016-10-13T00:00:00Z When plants lose water to evaporation in dry weather, their leaves become enriched in a heavy hydrogen isotope, deuterium. Greenland’s Vikings may have vanished because they ran out of water 2022-03-22T04:00:00Z TAE's "Norman" device powers its reactions with "regular" hydrogen and deuterium - a more benign, if less potent choice. Fusion race kicked into high gear by smart tech 2022-02-09T05:00:00Z The second promising technique aims multiple lasers at tiny fuel pellets filled with a mixture of deuterium and tritium. College Physics for AP Courses 2015-08-12T00:00:00Z But occasionally, a deuterium nucleus does capture a neutron and is transformed into tritium. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z Objects with less than 13 MJ do not fuse deuterium and are usually considered planets. Astronomy 2016-10-13T00:00:00Z By measuring the deuterium content of leaf remains from layers in the lake mud, the researchers found that southern Greenland’s climate became progressively drier during the Norse period, as they report today in Science Advances. Greenland’s Vikings may have vanished because they ran out of water 2022-03-22T04:00:00Z Most fusion reactors run on ordinary hydrogen or deuterium, which allows them to explore the behavior of plasmas while avoiding the complications of tritium, which is both radioactive and scarce. European fusion reactor sets record for sustained energy 2022-02-09T05:00:00Z There are equal numbers of deuterium and tritium nuclei in the mixture. College Physics for AP Courses 2015-08-12T00:00:00Z Some say fusion reactors could create their own startup tritium by running on deuterium alone. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z Deuterium can only provide an estimate of the density of ordinary matter because the abundance of deuterium is determined by the particles that interact to form it, namely protons and neutrons alone. Astronomy 2016-10-13T00:00:00Z The usual fuel for producing controlled fusion in reactors consists of a mix of the heavy hydrogen isotopes deuterium and tritium, which may unite to make helium. U.S. Project Reaches Major Milestone toward Practical Fusion Power 2022-02-02T05:00:00Z First, they had to revive the reactor’s tritium-handling facilities, not used for 2 decades, which extract unburned tritium and deuterium ions from waste gas after each shot and recycle them. European fusion reactor sets record for sustained energy 2022-02-09T05:00:00Z Yet the average backyard swimming pool has about 6 kg of deuterium in it, so that fuel is plentiful if it can be utilized in a controlled manner. College Physics for AP Courses 2015-08-12T00:00:00Z Many efforts cage a superhot plasma in a magnetic field; NIF uses a pulse from the world’s highest energy laser to compress a peppercorn-size capsule of the hydrogen isotopes deuterium and tritium. Science’s 2021 Breakthrough of the Year: AI brings protein structures to all 2021-12-15T05:00:00Z Because dark matter particles do not affect the production of deuterium, measurement of the deuterium abundance cannot tell us how much dark matter exists. Astronomy 2016-10-13T00:00:00Z The NIF team used 192 high-power lasers, all focused into a chamber called a hohlraum that is about the size and shape of a pencil’s eraser and contains the fuel capsule of deuterium and tritium. U.S. Project Reaches Major Milestone toward Practical Fusion Power 2022-02-02T05:00:00Z A key ingredient the Germans needed to produce an atomic bomb was heavy water, which is water made of a hydrogen isotope called deuterium that has twice the mass of regular hydrogen. Did Nazis Produce These Uranium Cubes? Researchers Look for an Answer. 2021-09-10T04:00:00Z But, it is only one-fourth the energy produced by the fusion of a kilogram mixture of deuterium and tritium as seen in Example 32.2. College Physics for AP Courses 2015-08-12T00:00:00Z A fusion reactor, or tokamak, aims to capture the energy released when nuclei of deuterium and tritium, the heavy isotopes of hydrogen, fuse to produce helium and energetic neutrons. This powerful electromagnet could help make fusion energy a reality 2021-09-08T04:00:00Z With this assumption, the model then accounts for the existence and structure of the CMB; the abundances of the light elements deuterium, helium, and lithium; and the acceleration of the expansion of the universe. Astronomy 2016-10-13T00:00:00Z Heavy water is a rarer version of H2O in which ordinary hydrogen has been replaced with deuterium—that is, with hydrogen atoms bearing an extra neutron. NASA Just Broke the ‘Venus Curse’: Here’s What It Took 2021-08-17T04:00:00Z Heavy water is a rarer version of the far more commonplace H2O, or normal water, in which ordinary hydrogen has been replaced with deuterium—that is, with hydrogen atoms bearing an extra neutron. Is NASA about to Lift the ‘Venus Curse?’ 2021-06-02T04:00:00Z The energy produced by the fusion of a 1.00-kg mixture of deuterium and tritium was found in Example Calculating Energy and Power from Fusion. College Physics for AP Courses 2015-08-12T00:00:00Z On Earth, about one in 5,000 hydrogen atoms is a version known as deuterium that is twice as heavy because its nucleus contains both a neutron and a proton. The Water on Mars Vanished. This Might Be Where It Went. 2021-03-19T04:00:00Z However, these objects would be made of ordinary matter, and the deuterium abundance tells us that no more than 5% of the critical density consists of ordinary matter. Astronomy 2016-10-13T00:00:00Z In studies of Apollo Moon rocks, Desch and his colleagues measured the ratios of hydrogen to deuterium, a heavier hydrogen isotope. Remains of impact that created the Moon may lie deep within Earth 2021-03-23T04:00:00Z Writing in Nature, Rau et al.1 report an astonishingly precise measurement of the mass of the deuteron — the nucleus of a hydrogen isotope called deuterium. Precise measurement of deuteron mass raises hopes of solving the nuclear-mass puzzle 2020-09-01T04:00:00Z You must estimate or look up the amount of water in the oceans and take the deuterium content to be 0.015% of natural hydrogen to find the mass of deuterium available. College Physics for AP Courses 2015-08-12T00:00:00Z But on Mars, the concentration of deuterium is markedly higher, about one in 700. The Water on Mars Vanished. This Might Be Where It Went. 2021-03-19T04:00:00Z Since these particles do not participate in nuclear reactions leading to the production of deuterium, the deuterium abundance puts no limits on how many WIMPs might be in the universe. Astronomy 2016-10-13T00:00:00Z The plasma is made of deuterium, a heavier isotope of hydrogen, and the goal is to bring it to temperatures and pressures at which colliding nuclei can fuse to form helium. After decades of decline, the U.S. national fusion lab seeks a rebirth 2020-02-06T05:00:00Z Figure 1 \| The importance of nuclear masses for physics research. a, The rotating molecule HD+ comprises a deuteron — the nucleus of a hydrogen isotope called deuterium — and a proton. Precise measurement of deuteron mass raises hopes of solving the nuclear-mass puzzle 2020-09-01T04:00:00Z Third, the universe contains large amounts of deuterium and helium, as it should if temperatures were once much higher. Making Sense of Modern Cosmology 2019-10-10T04:00:00Z They set the temperature to -263 degrees Celsius and attached two deuterium discharge lamps to the chamber to cause the chemical reactions. Building blocks of life may have come from deep space: 'Key to unraveling fundamental questions for humankind' 2019-09-30T04:00:00Z Next, fusion reactions produced deuterium, helium, and lithium nuclei. Astronomy 2016-10-13T00:00:00Z Replacing some of the deuterium with tritium, an even heavier isotope of hydrogen, could make the reactions self-sustaining. After decades of decline, the U.S. national fusion lab seeks a rebirth 2020-02-06T05:00:00Z Water that forms in very cold interplanetary or interstellar environments is thought to incorporate more of the heavy deuterium than in warmer conditions. Planet Plates, Metal Moon and Comet Cocktails 2019-06-15T04:00:00Z And, by this logic, replacing hydrogen with the heavier isotope deuterium should lower the critical temperature. Superconductivity near room temperature 2019-05-21T04:00:00Z Some models suggest the abundance of deuterium grows linearly moving away from the sun; others suggest the abundance shrinks under those same circumstances. Hyperactive Comets Hint at Origins of Earth's Oceans 2019-05-09T04:00:00Z Measurements of the deuterium abundance in today’s universe show that the total amount of ordinary matter in the universe is only about 5% of the critical density. Astronomy 2016-10-13T00:00:00Z Hydrogen’s cousins, deuterium and tritium, called heavy hydrogen, have been used to make hydrogen bombs. Lightweight of periodic table plays big role in life on Earth 2019-03-17T04:00:00Z In Jackson’s case that meant combining two atoms of deuterium gas in the fusion reactor’s plasma core which ejected a neutron into a device that slowed it down and detected nuclear fusion. Teen builds working nuclear fusion reactor in Memphis home 2019-02-19T05:00:00Z The current experiment used 168 of the lasers at a lower setting to set off a series of reverberating shock waves through ultracool liquid deuterium. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z Several that seek to replicate the chaotic, turbulent mixing of material in the early solar system predict deuterium abundances varying wildly at different points for no discernible reason. Hyperactive Comets Hint at Origins of Earth's Oceans 2019-05-09T04:00:00Z In addition to the positron, the fusion of two hydrogen atoms to form deuterium results in the emission of a neutrino. Astronomy 2016-10-13T00:00:00Z Unlike gassy worlds such as Jupiter, brown dwarfs are heavy enough to faintly shine by burning deuterium, a stable chemical form of hydrogen. It's Full of Stars: New 3-D Milky Way Map Could Settle Debate over Who Discovered the First Exoplanet 2018-04-20T04:00:00Z Chuzhoy, L. & Shapiro, P. R. Ultraviolet pumping of hyperfine transitions in the light elements, with application to 21 cm hydrogen and 92 cm deuterium lines from the early universe. Possible interaction between baryons and dark-matter particles revealed by the first stars 2018-02-27T05:00:00Z The researchers at both labs are preparing to run additional experiments, compressing hydrogen instead of deuterium. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z The main fuels are deuterium and tritium, both rare but inexpensive forms of hydrogen. A Giant Nuclear Blast, but a Hydrogen Bomb? Too Soon to Say 2017-09-03T04:00:00Z The challenge is keeping the deuterium and tritium—which will participate in fusion reactions—hot enough and dense enough, for a long enough time to produce energy. Astronomy 2016-10-13T00:00:00Z Brown dwarfs, on the other hand, are heated from the inside-out, using deuterium fusion to reach similar temperatures and atmospheric chemistry. It's Full of Stars: New 3-D Milky Way Map Could Settle Debate over Who Discovered the First Exoplanet 2018-04-20T04:00:00Z The deuterium provides a clear “fingerprint” for what plants contribute to the process, he says. Trees in the Amazon make their own rain 2017-08-04T04:00:00Z That compressed the deuterium to a pressure that was 6 million times greater than atmospheric pressure while keeping temperatures to what the physicists regarded as cool: below 3,000 degrees Fahrenheit. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z The fusion reactors that Princeton Satellite Systems is developing uses low-frequency radio waves to heat a mix of deuterium and helium-3, and magnetic fields to confine the resulting plasma in a ring. Could Tiny Fusion Rockets Revolutionize Spaceflight? 2017-06-12T04:00:00Z How much energy is released when a proton combines with a deuterium nucleus to produce tritium, 3He? Astronomy 2016-10-13T00:00:00Z Meanwhile any object less than 13 Jupiter masses should fail to trigger deuterium fusion and thus would be a planet. It's Full of Stars: New 3-D Milky Way Map Could Settle Debate over Who Discovered the First Exoplanet 2018-04-20T04:00:00Z What’s more, the deuterium content was highest at the end of the Amazon’s dry season, during the “greening” period when photosynthesis was strongest. Trees in the Amazon make their own rain 2017-08-04T04:00:00Z At Sandia National Laboratories in Albuquerque, intense bursts of magnetic fields were used to compress samples of deuterium, a heavier form of hydrogen. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z The fuels were deuterium and tritium, rare forms of hydrogen. U.S. Nuclear History Offers Clues to North Korea’s Progress 2017-05-22T04:00:00Z Isotopic analysis of deuterium in the water ejected by the comet shows that it is different from the water found on Earth. Astronomy 2016-10-13T00:00:00Z Fusion bombs, in contrast, explode when light atoms like deuterium join together. Bikini Islanders Still Deal With Fallout of U.S. Nuclear Tests, 70 Years Later 2016-06-29T04:00:00Z Early studies will use only hydrogen or deuterium for simplicity, leaving the radioactive tritium for later. Fusion megaproject confirms 5-year delay, trims costs 2016-06-16T04:00:00Z JET is also the only tokamak in the world equipped to use the fuel that will eventually power ITER: a mix of the hydrogen isotopes deuterium and tritium. U.K.-E.U. fission could harm fusion research 2016-06-14T04:00:00Z While comets, which form far out in the solar system, carry water rich in deuterium, water formed nearer the sun is richer in hydrogen. Water inside moon mostly from asteroids, study suggests 2016-05-31T04:00:00Z The International Astronomical Union considers the distinctive feature to be deuterium fusion. Astronomy 2016-10-13T00:00:00Z In 1993, the laboratory’s immense Tokamak Fusion Test Reactor began a series of runs using a mix of deuterium and tritium, two heavier forms of hydrogen. Ronald C. Davidson, Pioneer of Fusion Power, Dies at 74 2016-05-29T04:00:00Z Injecting tritium and deuterium, the heavier hydrogen isotopes, and achieving fusion would happen several years later. US advised to stick with troubled fusion project ITER 2016-05-25T04:00:00Z JET researchers are currently testing how the machine behaves when filled with hydrogen, deuterium, and tritium individually before attempting deuterium-tritium burns in 2019. U.K.-E.U. fission could harm fusion research 2016-06-14T04:00:00Z The idea is to use intense magnetic fields to trap an ultrahot plasma of deuterium and tritium nuclei in a huge donut-shaped vacuum chamber. U.S. should stick with troubled ITER fusion project, secretary of energy recommends 2016-05-26T04:00:00Z The fusion of deuterium can happen at a lower temperature than the fusion of hydrogen. Astronomy 2016-10-13T00:00:00Z This is a conventional fission bomb that contains a small quantity of the hydrogen isotopes tritium and deuterium, which fuse to release extra neutrons that greatly boost the fission reaction and explosive yield. What kind of bomb did North Korea detonate? 2016-01-07T05:00:00Z What North Korea probably did was test a “boosted” device that uses a gas of deuterium and tritium, two hydrogen isotopes. North Korea is a joke. And that’s the problem. 2016-01-08T05:00:00Z The enormous heat released when the fusion explosion goes off within the bomb compresses a core fuel of hydrogen—specifically the hydrogen isotopes deuterium and tritium. Here's the Difference Between a Hydrogen Bomb and an Atom Bomb 2016-01-06T05:00:00Z They will use deuterium, a heavier type, or isotope, of the element. German plasma success raises nuclear fusion hopes - BBC News 2015-12-11T05:00:00Z The amount of deuterium that can be produced in the first 4 minutes of creation depends on the density of the universe at the time deuterium was formed. Astronomy 2016-10-13T00:00:00Z In order to work, it relied on a fission explosion that would trigger fusion in liquid deuterium, a heavy hydrogen isotope. What the First H-Bomb Test Looked Like 2015-11-02T05:00:00Z By far the most popular answer is deuterium and tritium, two isotopes of hydrogen. Inside the Quest for Fusion, Clean Energy’s Holy Grail 0002-11-29T05:00:00Z Rain that falls during dry periods is rich in deuterium, a heavy isotope of hydrogen. Ocean sediments suggest dry future for Horn of Africa 2015-10-08T04:00:00Z Adding a neutron, to create deuterium, doubles the mass. Drugs that live long will prosper 2015-09-03T04:00:00Z If the density were relatively high, nearly all the deuterium would have been converted into helium through interactions with protons, just as it is in stars. Astronomy 2016-10-13T00:00:00Z A 10-fold increase in temperature would bring them into the realm of sparking reactions in conventional fusion fuel, a mixture of the hydrogen isotopes deuterium and tritium, known as D-T. Secretive fusion company makes reactor breakthrough 2015-08-24T04:00:00Z This is fusion’s low-hanging fruit, because deuterium and tritium fuse at a lower temperature than any other option, a comparatively mild 100 million degrees Celsius. Inside the Quest for Fusion, Clean Energy’s Holy Grail 0002-11-29T05:00:00Z Leaf waxes that contain higher levels of deuterium thus signal dry spells. Ocean sediments suggest dry future for Horn of Africa 2015-10-08T04:00:00Z For instance, the bonds deuterium forms with carbon atoms are stronger than those formed between carbon and normal hydrogen. Drugs that live long will prosper 2015-09-03T04:00:00Z The amount of deuterium we see today thus gives us a clue to the density of the universe when it was about 4 minutes old. Astronomy 2016-10-13T00:00:00Z The project's aim is to fuse two isotopes of hydrogen — tritium and deuterium — to deliver a powerful, clean source of electricity. Nuclear physics: Pull together for fusion 2015-06-08T04:00:00Z By contrast … the lithium from a single laptop battery and the deuterium from 45 liters of water could generate enough electricity using fusion to supply an average U.K. consumer’s energy needs for 30 years.” Inside the Quest for Fusion, Clean Energy’s Holy Grail 0002-11-29T05:00:00Z The atmosphere of Mars contains eight times more deuterium that Earth’s. Vast Ocean Once Covered Mars’ Surface, NASA Study Shows 2015-03-06T05:00:00Z Add some deuterium, then, and a drug may last longer. Drugs that live long will prosper 2015-09-03T04:00:00Z Theoretical models can relate the density then to the density now; thus, measurements of the abundance of deuterium today can give us an estimate of the current density of the universe. Astronomy 2016-10-13T00:00:00Z By looking at the levels of the heavier hydrogen isotope deuterium and comparing the ratio to the lighter hydrogen, scientists can work out the history of a planet’s water. Mysterious Methane Spike Provides Tantalising Clue To Life On Mars 2014-12-16T05:00:00Z It’s all H2O, but some of the H is a rare form of hydrogen known as deuterium, whose atoms carry not just a proton like the ordinary stuff, but a neutron as well. Dying for a Drink: How the Earth Got its Water 2014-12-11T05:00:00Z When studying the northern and southern poles of Mars, researchers discovered large quantities of deuterium. Vast Ocean Once Covered Mars’ Surface, NASA Study Shows 2015-03-06T05:00:00Z On Earth, three in 10,000 water molecules have the heavy hydrogen isotope deuterium. Rosetta shows Earth's water did not come from comets: study 2014-12-10T05:00:00Z The measurements of deuterium indicate that the present-day density of ordinary matter—protons and neutrons—is about 5 × 10–28 kg/m3. Astronomy 2016-10-13T00:00:00Z While the vast majority of liquid on our planet is made up of hydrogen and oxygen atoms, very occasionally a hydrogen atom will be replaced with a deuterium atom. Comets 'not source of Earth's water' 2014-12-10T05:00:00Z But on the Churyumov-Gerasimenko comet that Rosetta is orbiting, the ratio is even higher, with deuterium molecules present at three times the concentration that they appear on Earth. Scientists no longer think Earth's water originated on comets 2014-12-10T05:00:00Z Ultra-dense deuterium, an isotope of hydrogen, is found in the earth's oceans, and tritium is made from natural lithium deposits. Lockheed says makes breakthrough on fusion energy project 2014-10-16T04:00:00Z Ultra-dense deuterium, an isotope of hydrogen, is found in the earth’s oceans, and tritium is made from natural lithium deposits. Lockheed announces breakthrough on nuclear fusion energy 2014-10-15T04:00:00Z From the abundance of deuterium, we know that not enough protons and neutrons are present, by a factor of about 20, to produce a critical-density universe. Astronomy 2016-10-13T00:00:00Z There is already evidence from the Herschel Space Observatory that at least some comets carry water with the same ratio of hydrogen to its heavier isotope, deuterium, as the water in Earth's oceans. Kuiper Belt Missions Could Reveal the Solar System’s Origins 2014-10-15T04:00:00Z This is because these clouds are subject to the continuous bombardment of cosmic rays, which tend to favour the inclusion of deuterium. Earth has water older than the Sun 2014-09-25T04:00:00Z So far, he says, Tri Alpha has run its C-2 only with deuterium, and it is a long way from achieving the extreme plasma conditions needed to burn its ultimate fuel. Plasma physics: The fusion upstarts 2014-07-22T04:00:00Z While running the experiment in this mode allows scientists to gather valuable scientific knowledge, both deuterium and tritium will be needed to exceed the record set by the Oxfordshire facility 17 years ago. UK team to shoot for fusion record 2014-04-24T09:38:27Z Protons, deuterium, helium, and some lithium were produced in the initial fireball. Astronomy 2016-10-13T00:00:00Z The pellet contains a layer of carefully frozen deuterium and tritium, the heavier forms of hydrogen, and in a brief moment — about one ten-billionth of a second — the imploding atoms fuse together. The Challenge: How to Keep Fusion Going Long Enough 2014-03-17T21:12:10Z But the biggest irony of all is that this is workable only for a deuterium/tritium target. Do We Really Need Nuclear Fusion for Power? 2014-02-13T08:10:00Z The company hopes that its reactor could eventually reach the hotter conditions needed to fuse deuterium with helium-3, another combination that produces only α-particles and protons, with no neutron by-products. Plasma physics: The fusion upstarts 2014-07-22T04:00:00Z The Livermore scientists made progress by changing the shape of the laser pulses to heat the hydrogen – a mix of two heavier isotopes known as deuterium and tritium – somewhat more gently. Giant Laser Complex Makes Fusion Advance, Finally 2014-02-12T21:44:23Z In such a future Red Giant scenario, Sion says Jupiter may accrete enough mass to turn into a deuterium or even hydrogen burning star. Nearest Dying White Dwarfs Likely Still Harbor Planets 2014-01-29T23:07:00Z And so, while still working on crystallization on the side, she tried an alternative technique — hydrogen–deuterium exchange mass spectrometry. Structural biology: More than a crystallographer 2014-01-29T18:51:49.908Z He solved that complication by replacing some of the hydrogen atoms with heavier versions known as deuterium and tritium so that they were no longer identical to the others. John W. Cornforth, 96, Nobel-Winning Chemist, Dies 2013-12-20T04:16:03Z SHINE's technology uses a linear accelerator to slam deuterium ions into tritium gas, producing helium and neutrons. Radioisotopes: The medical testing crisis 2013-12-11T18:50:32.531Z Scientists plan to compare Maven’s measurements of the current ratio of deuterium with hydrogen in the atmosphere to the ratio bound up in eons-old rocks on the Martian surface. NASA Probe to Track Mars s Missing Atmosphere 2013-11-14T11:45:00.373Z Inside is a tiny pellet of deuterium and tritium. Pressure for Results Mounts as Fusion Research Crawls Forward 2013-10-16T19:15:00.427Z It is also the only tokamak currently equipped to operate with a full fusion fuel made of an equal mixture of the hydrogen isotopes deuterium and tritium. Europe's JET Set Ponders Future of World's Largest Fusion Reactor 2013-07-03T22:33:33Z He then followed where the deuterium and tritium atoms went during the molecular dance. John W. Cornforth, 96, Nobel-Winning Chemist, Dies 2013-12-20T04:16:03Z Unlike ordinary hydrogen, with just a proton in its nucleus, deuterium also contains a neutron. Earth's Great Gift to the Moon: Water 2013-05-10T10:55:00Z The $671-million also carries an ultraviolet spectrograph to map global trends in the planet’s thin upper atmosphere as well as an instrument to detect neutral gas—especially a chemical called deuterium. NASA Probe to Track Mars s Missing Atmosphere 2013-11-14T11:45:00.373Z But it may burn to some degree, using a heavy isotope of hydrogen called deuterium as fusion fuel. Astronomer Locates Previously Unseen Neighbor to the Sun 2013-03-11T19:45:09.367Z Specifically, experimenters found regular musk molecules smelled different from ones that contain deuterium. Study Bolsters Quantum Vibration Scent Theory 2013-01-28T08:45:00.193Z One way to test the idea was to prepare two molecules of identical shape but with different vibrations - done by replacing a molecule's hydrogen atoms with their heavier cousins called deuterium. 'Quantum smell' idea gains ground 2013-01-28T00:05:05Z The analysis shows that the Martian water vapour contains five times as much deuterium than that found in typical Earth water. Rover's big lab up and running 2012-12-04T02:50:53Z As 500 terawatts of laser power hits the capsule, it generates X-rays that blast into the pellet, causing the atoms of deuterium and tritium inside to fuse. Laser lab shifts focus to warheads 2012-11-07T18:20:40.347Z A small capsule of deuterium and tritium a few millimeters in diameter resides inside a larger chamber of a few centimeters in size. Dot Earth Blog: Exploring whether fusion energy research is still worth the cost comp 2012-10-18T21:24:25Z Before the year is out, scientists at the National Ignition Facility in California hope to fire the world’s most powerful laser into a small test chamber with pea-sized fuel pellets of deuterium and tritium inside. Stop Building Bombs and Start Building Starships 2012-10-08T19:45:06.687Z The target in MagLIF is a tiny cylinder about 7 millimeters in diameter; it's made of beryllium and filled with deuterium and tritium. A Step Forward for Fusion 2012-09-18T16:45:00Z Atoms of deuterium contain a neutron, whereas "normal" hydrogen atoms do not. Antarctica warming 'not unique' 2012-08-23T11:55:19Z Carbon's big drawback is that it's very happy to absorb deuterium and tritium. How to Line a Thermonuclear Reactor 2012-08-16T20:51:00Z That’s when it hit me that we could make a good case for an unambiguously designed message by transmitting molecules that have all or many of their hydrogen atoms replaced by deuterium. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z Rather, in theory, it fuses them together – the way the sun works – typically combining isotopes of hydrogen known as deuterium and tritium. Iranian team to collaborate with US company on nuclear fusion project 2012-05-25T17:59:25Z Fusion reactors heat and squeeze a plasma—an ionized gas—composed of the hydrogen isotopes deuterium and tritium, compressing the isotopes until their nuclei overcome their mutual repulsion and fuse together. A Step Forward for Fusion 2012-09-18T16:45:00Z When a warhead detonates, it squeezes the deuterium and tritium until they fuse together. Isotopes Hint at North Korean Nuclear Weapons Tests in 2010 2012-02-03T20:15:16.477Z Near the point of maximum compression, the deuterium nuclei in the centre would fuse, releasing a burst of neutrons that would trigger the nuclear explosion. Iran?s nuclear plan revealed 2011-11-16T18:20:26.600Z The problem with deuterium is that it might be hard to detect against the abundant background of normal hydrogen. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z Fusion gave rise to the "too cheap to meter" vision in the 1950s, with the notion that a plentiful supply of deuterium could inexpensively meet energy needs. Iranian team to collaborate with US company on nuclear fusion project 2012-05-25T17:59:25Z One of the clouds also shows traces of deuterium, also known as heavy hydrogen, the nucleus of which contains not only a proton, as ordinary hydrogen does, but also a neutron. Fresh Start: Scientists Glimpse Unsullied Traces of the Infant Universe 2011-11-10T22:45:00.210Z "For these two clouds, we clearly see multiple lines associated with the presence of hydrogen and, in one of the clouds, also lines associated with deuterium," hydrogen atoms with extra neutrons on board, Fumagalli says. Astronomers Spot the Universe's First Gas 2011-11-10T19:00:00Z The core of the sphere would carry a small neutron initiator, possibly made of uranium and the heavy hydrogen isotope, deuterium. Iran?s nuclear plan revealed 2011-11-16T18:20:26.600Z Another idea comes from the comments section of my original posts where some readers recommended transmitting radio signals at the frequency of deuterium itself or deuterated water. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z D/H measures the proportion of deuterium, or heavy hydrogen, to ordinary hydrogen. Chemical analysis of a comet?s ice gives a clue to source of water on Earth 2011-10-10T19:03:21Z Specifically, the ratio of heavy hydrogen, or deuterium, to regular hydrogen was too high in the comets. New Evidence For Comet Sources Of Ocean Water 2011-10-10T17:45:00.217Z Their spacecraft would be powered by tiny thermonuclear explosions caused by compressing pellets of deuterium and helium-3 with laser blasts. Life Out There: Offering Funds, U.S. Agency Dreams of Sending Humans to Stars 2011-08-18T03:30:43Z The types of hydrogen that will be fused are called deuterium and tritium. Fusion Experiment Faces New Hurdles 2011-06-24T04:21:11Z I propose therefore that the search for extraterrestrial intelligence should include the search for molecules enriched in deuterium, carbon-13 and minor isotopes of other elements in addition to more traditional signals like electromagnetic radiation. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z A polyhedral arrangement of electromagnetic coils traps electrons at its center, producing a potential well for positively charged ions such as deuterium. Projects in Profusion: A Skeptical Look at 3 Wild Fusion-Energy Schemes 2011-05-26T11:15:05.103Z The disclosure about the atomic trigger centered on a rare material — uranium deuteride, a form of the element made with deuterium, or heavy hydrogen. Watchdog Finds Evidence That Iran Worked on Nuclear Triggers 2011-05-25T01:48:25Z At the heart of the detection method is Wilson’s fusion reactor, which melds atoms of deuterium together and creates neutrons. Youthful Ingenuity Honored at Intel Science & Engineering Fair 2011-05-16T21:12:00Z The next stage would be to build a device that generates neutrons by fusing deuterium, a hydrogen isotope. U.K. Start-Up Aims to Cash in on Small Fusion Reactor 2011-02-17T18:33:55Z Hydrogen is the most abundant element in the universe but deuterium comprises 1 atom in about 6000 of hydrogen and amounts to only 0.02%, while tritium is even scarcer. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z In a fusion reaction, energy is released when light atomic nuclei - the hydrogen isotopes deuterium and tritium - are fused together to form heavier atomic nuclei. Fusion finance plan is rejected 2010-12-16T17:20:59Z That's because comet water contains about twice as many deuterium atoms. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z The oceans of the world contain sixty billion year's worth of deuterium. Energetic debate 2010-03-05T14:02:00Z It contains a tiny pellet of fuel made from an isotope of hydrogen called deuterium. 2010-01-28T19:10:00Z The molecule need not even be fully deuterated since even partial deuterium enrichment is very unlikely to occur naturally. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z Deuterons or alpha particles are obtained in a similar fashion using deuterium or helium gas in place of hydrogen. LRL Accelerators The 184-Inch Synchrocyclotron While the high deuterium content in comets makes it unlikely that they were the primarily source of Earth's water, it doesn't rule out the Late Heavy Bombardment theory. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z My analysis of the water samples shows a layer almost a foot deep of nearly pure deuterium. The Caves of Fear The larger yield nuclear weapons derive a substantial part of their explosive force from the fusion of heavy forms of hydrogen--deuterium and tritium. Worldwide Effects of Nuclear War: Some Perspectives Full replacement by deuterium however would cinch the evidence. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z It's possible, experts say, that the water-bearing bombs were some type of comet or meteorite with just the right deuterium and gas ratios. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z Some meteorites contain water, and don't have an excess of deuterium, and during Earth's formation, some experts hypothesize, numerous such objects - some the size of small planets - were careening around the solar system. Earth contains a vast amount of water, but scientists are unsure of its origins 2010-11-08T21:10:00Z Well, heavy water is made of one atom of oxygen plus two atoms of deuterium, which is the first isotope of hydrogen. The Caves of Fear "It's true that one of the possibilities in building a hydrogen bomb concerns deuterium," the scientist said. The Caves of Fear Fortunately we have several spectroscopic techniques to detect deuterium that include extremely sensitive mass spectrometry methods. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z Then, for a considerably higher price, he would undertake to collect a sample of the deuterium they were using. The Caves of Fear
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