Semimicroscopic Description of High-Energy Charge-Exchange Spin-Monopole Excitations in Medium-Heavy Spherical Nuclei

Abstract

The semimicroscopic particle–hole dispersive optical model developed recently is applied to describing main properties of the Gamow–Teller and charge-exchange giant spin-monopole resonances in medium-heavy closed-shell nuclei. The description in question includes energy-averaged strength functions, projected transition densities, and partial branching ratios for direct single-nucleon decay. By way of example, this approach is implemented for the $${}^{208}$$ Pb parent nucleus. The results of respective calculations are compared with available experimental data.