| Critical mass is the minimum mass of fissionable material required to sustain a nuclear fission reaction. |
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| An atomic bomb is a weapon of mass destruction which uses nuclear fission to produce vast amounts of energy. |
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| The reason is that nuclear fission occurs best with neutrons that move at relatively modest speeds, called thermal neutrons. |
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| The development of nuclear fission weapons and later thermonuclear fusion weapons represented an incomparable revolution in weaponry. |
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| Through their studies of radioactive elements, they discovered nuclear fission. |
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| The atoms then undergo nuclear fission, producing daughter nuclei and more neutrons. |
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| The products of uranium mining and nuclear fission remain radioactive for hundreds of thousands of years. |
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| These engines use the heat of nuclear fission to drive steam turbines, which in turn charge the batteries. |
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| Pellets of nuclear fuel are contained within the fuel rods of nuclear fission reactors. |
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| Health officials did not test for Strontium 90, a radioactive carcinogenic byproduct of nuclear fission. |
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| The simple atom bomb owed its explosive power to the energy released by nuclear fission, or fusion. |
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| Imagine an energy source that is more powerful than nuclear fission or even nuclear fusion. |
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| Before World War II, German chemists Otto Hahn and Fritz Strassmann discovered nuclear fission. |
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| Nuclear fusion reactions are like nuclear fission reactions, therefore, in the respect that some quantity of mass is transformed into energy. |
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| The element can be prepared artificially in particle accelerators and is a byproduct of nuclear fission reactions. |
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| Element 109 is named meitnerium, for Lise Meitner, who was the first to realize that uranium undergoes nuclear fission. |
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| And no one's going to be able to invent all the hydrogen-powered cars and nuclear fission energy we're supposed to have in the future. |
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| Furthermore, in commercial reactors, nuclear fission is controlled in a system built to make sure the nuclear reaction is controlled. |
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| Following a referendum in 1978, Austria renounced the use of nuclear fission for power generation and does not operate nuclear power plants. |
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| It is likely that nuclear fission, hydroelectricity, wind power and direct solar power will be important sources for future electricity generation. |
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| Their research provided the groundwork for other modern-day solutions that use microwave energy and light to propel ships, rather than nuclear fission. |
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| Why is the public too dumb to understand the Privy Council, too unscientific to understand genetic engineering, but is now an expert on nuclear fission? |
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| Even before the discovery of nuclear fission, theorists began thinking of an atomic nucleus as something more complicated than a bag of hard particles. |
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| Neutron radiation: Neutron radiation occurs when neutrons are ejected from the nucleus by nuclear fission and other processes. |
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| The discoveries of nuclear fission and nuclear fusion appeared to violate that law. |
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| But the government did make a choice to invest massively in traditional nuclear energy, in nuclear fission. |
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| Lise Meitner explained nuclear fission and was honoured with numerous important accolades for her important insights into atomic physics. |
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| It does of course cover the generation of electricity through nuclear fission. |
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| Holtkamp: Lots of nuclear fission reactors are operational and used to make energy right now, so fission has the advantage that it works today. |
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| The security, waste-disposal and terrorist perils of a rapid expansion of nuclear fission appear at the moment insuperable. |
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| Knowing that the Germans had discovered nuclear fission,he laid aside his moral scruples to develop the atom bomb. |
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| The graphite helps limit the pace of nuclear fission. |
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| The European Union will also provide financial support for research in the fields of nuclear fission and radiation protection in the years to come. |
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| In other words, in Ontario it is very cost-effective to invest in Ontario in this type of energy that is extremely harmful to the environment and highly dangerous: nuclear fission. |
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| What about hydrogen, nuclear fusion and nuclear fission? |
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| Nuclear fusion is the release of energy through the combination of light atomic nuclei rather than splitting the heavy nuclei as in the case of traditional nuclear fission power. |
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| Yet Jülich had also been working in many other fields apart from nuclear fission for a long time, including solid-state and environmental research, and these were expanded and supplemented by other disciplines. |
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| At the time, electrical energy from nuclear fission was seen as a cheap energy source for the future, and the nuclear industry required additional engineering capacity for that sector to evolve. |
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| In its central part, the reactor core's heat is generated by controlled nuclear fission. |
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| Heat from nuclear fission is used to raise steam, which runs through turbines, which in turn powers the electrical generators. |
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| Since nuclear fission creates radioactivity, the reactor core is surrounded by a protective shield. |
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| Fusion reactors, which are still in the early stages of development, diminish or eliminate some of the risks associated with nuclear fission. |
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| Technetium is produced in quantity by nuclear fission, and spreads more readily than many radionuclides. |
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| Radionuclides are produced as an unavoidable result of nuclear fission and thermonuclear explosions. |
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| The process of nuclear fission creates a wide range of fission products, most of which are radionuclides. |
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| In physics, the discovery of nuclear fission has led to both nuclear weapons and nuclear power. |
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| The nature of activities within our unit that deals with nuclear fission and radiation protection represents itself a very high specificity compared to other areas. |
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| But nuclear fission will eventually be replaced by nuclear fusion, that is, converting hydrogen into helium to produce an unlimited supply of clean energy. |
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| For this reason, research and development is being conducted throughout the world targeting nuclear reactors that can achieve nuclear fission in transuranic waste. |
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| He underscored lasers' crucial roles in different scientific fields, including biology, medication, nuclear fission and fusion, as well as materials processing. |
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| Yet they're building power plants, To be run on nuclear fission. |
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| He discovered nuclear fission, which made the atomic bomb possible. |
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| The combustion of fossil fuels supplies most of the energy to these engines, with a significant fraction from nuclear fission and some from renewable sources. |
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| Otto Hahn was a pioneer in the fields of radiochemistry and discovered nuclear fission, while Ferdinand Cohn and Robert Koch were founders of microbiology. |
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| Gamma radiation is similarly caused when uranium undergoes nuclear fission, which also produces neutron radiation, capable of deep penetration of the body. |
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