beta decay

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beta decay

n.
Radioactive decay in which a beta particle is emitted by an atomic nucleus.

beta decay

n
(General Physics) the radioactive transformation of an atomic nucleus accompanying the emission of an electron. It involves unit change of atomic number but none in mass number. Also called: beta transformation or beta process

be′ta decay`


n.
a radioactive process in which a beta particle is emitted from the nucleus of an atom.
[1930–35]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.beta decay - radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particlebeta decay - radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle
radioactive decay, disintegration, decay - the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
References in periodicals archive ?
Mohapatra, "Status of neutrino mass in supersymmetric and superstring theories," in Proceedings of the International Symposium on Nuclear Beta Decays and Neutrino, pp.
The other 99 percent is uranium-238, which is not fissile but rather fertile; if it gains a neutron of the right energy, it turns into uranium-239, which after a couple of beta decays becomes fissile plutonium-239.
Since the highest-energy beta decays from [sup.211]Pb ([E.sub.[beta]] = 1367 keV) and 207T1 ([E.sub.[beta]] = 1418 keV) did not coincide with [gamma]-rays, the extrapolation is expected have a small non-linear component.
The new, unexpected result is that so much energy escapes by neutrino emission that the remaining energy released in the beta decays is not sufficient to ignite the X-ray superbursts that are observed.
Ejiri, "Double beta decays and neutrino masses," Journal of the Physical Society of Japan, vol.
Experimental constraints on the values of [lambda] and |[V.sub.ud]| are coming from nuclear [0.sup.+] - [0.sup.+] beta decays [4], CKM unitarity (assumes conserved vector current, CKM unitarity, and values of |[V.sub.us]| and |[V.sub.ub]| from [3]), measurements of the neutron beta decay correlation A [5]
Beta decays of [sup.39]Ar have a Q value of 565 keV and do not contribute to the background for neutrinoless double beta decay.
(3) to [D.sub.t] and [R.sub.t] in allowed beta decays is given by [9]