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beta decay |
Also found in: Medical, Wikipedia, Hutchinson | 0.07 sec. |
beta decayAny of three processes of radioactive disintegration in which a beta particle is spontaneously emitted by an unstable atomic nucleus in order to dissipate excess energy. Beta particles are either electrons or positrons. The three beta-decay processes are electron emission, positron emission, and electron capture. The process of beta decay increases or decreases the positive charge of the original nucleus by one unit without changing the mass number. Though beta decay is in general a slower process than gamma or alpha decay, beta particles can penetrate hundreds of times farther than alpha particles. Beta decay half-lives are a few milliseconds or more. See also radioactivity. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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] beta decays [4], CKM unitarity (assumes conserved vector current, CKM unitarity, and values of |[V. Another class of effects leads to gamma ray asymmetries from beta decays of polarized nuclei produced by interactions of the beam with materials upstream of the hydrogen target. The entire experiment is inside a room-sized tank that chills it to 160 kelvins to increase the incidence of beta decays as the gas moves along. |
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