beta decay

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beta decay

a type of radioactivity that results in the emission of beta particles, either electrons or positrons. See also beta particle.

beta decay

Low-level radioactive decay in which particles, usually an electron with an antineutrino, or less commonly a positron with an antineutrino, are emitted.
References in periodicals archive ?
Lopez Castro, Neutron beta decay and the current determination of |[V.
Back around 1930, difficulties in balancingenergy in beta decay of atomic nuclei led Wolfgang Pauli to postulate the existence of a subatomic particle that had no rest mass, which Enrico Fermi named "little neutral one' or neutrino.
The beta decay experiments that are searching for neutrino mass all use tritium, the heaviest, rarest and only radioactive isotope of hydrogen, which is also the simplest nucleus susceptible to beta decay.
Outside of a nucleus, however, free neutrons last only about 10 minutes before disintegrating by means of beta decay.
The upshot of each beta decay is an atom with a nucleus that contains one more proton than it did before.
In Section 3 we summarize the limits on the CPV beta decay coupling constants implied by beta decay experiments.