Sentences with phrase «nuclear reactions»

The role demands sound knowledge of nuclear chamber and process of nuclear reactions.

The heat used to boil water can come from burning of a fuel, from nuclear reactions, or directly from the sun or geothermal heat sources underground.

More recently scientists have been making some progress on a variation of this technology called low - energy nuclear reaction.

Eventually the hydrogen gas gets dense and hot enough for nuclear reactions to start.

There are no more nuclear reactions occurring so the white dwarf cools off from an initial temperature of about 100,000 K.

The basic principle behind a nuclear reactor is simple: the heat produced by a controlled nuclear reaction is used to create steam pressure that drives a power - generating turbine.

As a result, astronomers are convinced that most dark matter must consist of particles that do not influence nuclear reactions.

Traditionally, stable ion beams have been used to measure nuclear reactions.

If the burning - hot fuel is not covered by adequate water, the heat from the ongoing nuclear reactions can cause the water to boil off.

To explain how stars work, we need to measure the rates of the important nuclear reactions.

When a star has used all the hydrogen in its core, nuclear reactions cease.

Forget nuclear reactions or quantum mechanics; they also can't create or destroy energy.

Three of the plant's six nuclear reactions went into meltdown after it was hit by a tsunami triggered by an earthquake.

Whether it's cold fusion, low - energy nuclear reactions, or something else — the names are all over the place — we still don't know.

Standard models of how the sun shines tell exactly how many neutrinos should be created by nuclear reactions in the solar core.

These particles are byproducts of nuclear reactions within stars (including our sun), supernovae, black holes and human - made nuclear reactors.

It is only created in significant amounts by nuclear reactions inside certain kinds of stars, including supernovae or what are called asymptotic giant branch (AGB) stars.

Others are produced in nuclear reactions inside the Sun.

Aaronson compares it to the first self - sustaining nuclear reaction, achieved by the Manhattan project in Chicago in 1942.

[5] These observations pin down the formation of elements heavier than iron through nuclear reactions within high - density stellar objects, known as r - process nucleosynthesis, something which was only theorised before.

They studied boulders from the New Zealand site where the glacial wood had been found, measuring the concentrations in the rocks of radioactive isotopes beryllium - 10 and chlorine - 36, which are produced by nuclear reactions between minerals and cosmic rays.

That field is in turn created by charged material driven by the heat of the core, which comes from neutrino - generating nuclear reactions.

«SHE - Factory will allow experiments with a sensitivity of approximately 100 times higher than what we have today,» says Yuri Oganessian, scientific leader of the Flerov Laboratory of Nuclear Reactions at the Joint Institute for Nuclear Research in Dubna.

Let me put it this way, I can if I want move electricity with steel wires, I can if I want make electricity or intense heat from thorium, or maybe in the future even potassium or hydrogen from water using nuclear reactions.

Nuclear fusion, the process that powers our sun, happens when nuclear reactions between light elements produce heavier ones.

About half the heat produced by Earth is thought to come from internal nuclear reactions, the other half from heat left over from Earth's earliest days as a red - hot planet.

Cosmologists have demonstrated that hydrogen and helium and their stable isotopes like deuterium were all synthesized just minutes after the Big Bang, when the Universe was hot enough to power nuclear reactions.

Stars shine because nuclear reactions in their interiors convert mass to energy at a rate of many million tons each second.

Many unstable atomic nuclei live long enough to be able to serve as targets for further nuclear reactions — especially in hot environments like the interior of stars.

Simultaneously, electrical discharges «drilled» thin plasma channels within the crust, producing other nuclear reactions and additional heat.

Over an 18 - month period, they worked in a windowless room, scribbling on a blackboard, feverishly figuring out how nuclear reactions in successive generations of stars could create the elements in the periodic table.

However, writing in the journal Nature, Hendrik Schatz and colleagues report results from theoretical calculations that identify previously unknown layers where nuclear reactions within the crust cause rapid neutrino cooling.

First predicted in 1930 by Wolfgang Pauli, who won a Nobel prize for this work in 1945, they are produced in various nuclear reactions: fusion, which powers the sun; fission, harnessed by humans to make weapons and energy; and during natural radioactive decay inside the Earth.

The resulting run - away nuclear reaction, fire and explosion released more than 400-fold the amount of radiation from the Hiroshima bomb, hitting Belarus hardest and extending as far as Ireland.

«Hoyle's equation,» as Clayton calls it, relates the mass of heavy elements ejected by dying stars to the rate of their death and the change in abundance of the various isotopes produced during successive nuclear reactions.

These elements could most plausibly have been produced by endergonic nuclear reactions during a supernova, or by transmutation via neutron absorption inside a massive second - generation star.

«If you remember the Fukushima nuclear reaction in Japan [in 2011], no one could get in there to turn the appropriate knobs to shut down the meltdown,» he says.

The continuous nuclear reaction, traveling in a smoldering flow of molten radioactive metal, was approaching the water.

A lightning storm can trigger an atmospheric nuclear reaction that leads to the production of antimatter and radiation, which may pose health risks

For instance, they were involved in debunking cold fusion in 1991, which was a hypothetical nuclear reaction that could occur around room temperature.

On the train back to Cornell, though, Bethe figured out the correct, more complicated nuclear reactions and soon sent a paper to the Physical Review.

It is barely capable of achieving a detectable nuclear reaction, so fusion is one of the least hazardous parts of this project.

Delayed neutron emission adds more neutrons to the stellar environment, that can then induce new nuclear reactions.

On 14 March, engineers decided they had to take further steps to cool the reactor vessel down, and so began pumping sea water into the vessel along with boron, an element that dampens nuclear reactions by soaking up the neutrons which drive them.

Bahcall's latest idea concerns one specific nuclear reaction inside the Sun.

DENVER — Ecosystems kilometers underground seem to thrive on food made via nuclear reactions, according to research presented here 14 February at the meeting of the American Association for the Advancement of Science, which publishes ScienceNOW.