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Chapitre 19
Radioactivité et équations nucléaires
Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The nucleus of an atom is composed of protons and, except for…
Types de radioactivité
The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture. Alpha (α) decay is…
Stabilité nucléaire
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is…
Énergie de liaison nucléaire
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass…
Décroissance radioactive et datation radiométrique
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay…
Fission nucléaire
Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and…
Électricité nucléaire
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or…
Fusion nucléaire
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process…
Transmutation nucléaire
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus…
Effets biologiques des rayonnements
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating,…
Metabolic Labeling of Leucine Rich Repeat Kinases 1 and 2 with Radioactive Phosphate
Leucine rich repeat kinases 1 and 2 (LRRK1 and LRRK2) are paralogs which share a similar domain organization, including a serine-threonine kinase…
Separation of Uranium and Thorium for <sup>230</sup>Th-U Dating of Submarine Hydrothermal Sulfides
The age of a submarine hydrothermal sulfide is a significant index for estimating the size of hydrothermal ore deposits. Uranium and thorium isotopes…
Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
Major and severe accidents have occurred three times in nuclear power plants (NPPs), at Three Mile Island (USA, 1979), Chernobyl (former USSR, 1986)…

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