A semimicroscopic description of Isoscalar Giant Multiple Resonances in medium-mass closed-shell nuclei

TL;DR

This paper presents a semimicroscopic model to describe isoscalar giant multipole resonances in medium-mass closed-shell nuclei, providing detailed predictions of their properties and decay probabilities.

Contribution

It introduces a semimicroscopic particle-hole dispersive optical model to analyze giant resonances, including overtones, in medium-mass nuclei, which is a novel approach.

Findings

Calculated resonance properties agree with experimental data

Predicted transition densities and decay probabilities

Analyzed resonances in 48Ca, 90Zr, and 132Sn

Abstract

Main properties of isoscalar giant multipole resonances (up to L=3), including L=0,2 overtones, in medium-mass closed-shell nuclei are described within the semimicroscopic particle-hole dispersive optical model. Main properties are characterized by the energy-averaged strength distribution, projected (one-body) transition density, and probabilities of direct one-nucleon decay. Calculation results obtained for the parameters of the mentioned resonances in the 48Ca, 90Zr, and 132Sn nuclei are compared with available experimental data.