Abstract

The probability of the β-transition is proportional to the product of the lepton part described by the Fermi function f(Q_β – E) and the nucleon part described by the β transition strength function S_β(E). Information on the structure of S_β(Е) is important for many nuclear physics areas. Reliable experimental data on the structure of S_β(Е) are necessary for predicting half-lives of nuclei far from the stability line, verifying completeness of decay schemes, calculating energy release from decay of fission products in nuclear reactors, calculating spectra of delayed particles, calculating the delayed fission probability and evaluating fission barriers for nuclei far from the β-stability line, calculating production of various elements in astrophysical processes, developing microscopic models for calculation of S_β(Е), especially in deformed nuclei, and etc.