Effect of nuclear structure on the single particle β− transitions in deformed nuclei

Abstract

In the framework of the Nilsson model the calculations of the so called shape factor for the first forbiddenβ− transitions 5/2+241Pu → 5/2−241Am and 7/2+177Lu → 7/2−177Hf are carried out. The dependence on the Nilsson potential parameters is studied. It turns out that for the transitions considered the calculated shape factor depends linearly on the electron energy and its slope is ≈ 10−3 per 20 keV. This can affect the analysis of electron spectra if the endpoint energy is sufficiently large.