(Of a beta transition) having an exceptionally high probability of occurrence as measured by the product of the half-life of the initial state and a function of the energy and momentum of the emitted electron.
Origin
1940s.
Definition of superallowed in US English:
superallowed
adjective
Nuclear physics
(Of a beta transition) having an exceptionally high probability of occurrence as measured by the product of the half-life of the initial state and a function of the energy and momentum of the emitted electron.