Damping of high-energy particle-hole-type nuclear excitations: A semimicroscopic model

M. H. Urin
Phys. Rev. C 87, 044330 – Published 23 April 2013

Abstract

A semimicroscopic model (particle-hole dispersive optical model) is formulated to describe the main relaxation modes of high-energy particle-hole-type excitations in medium-heavy mass nuclei. Within this model, Landau damping and the single-particle continuum are considered microscopically, while the spreading effect is treated phenomenologically, employing a statistical assumption. Description of direct nucleon decay of the above-mentioned excitations (including giant resonances) is a unique feature of the proposed model, which in applying to closed-shell nuclei is arranged for practical implementations. The methodical similarity of formulations of the single-quasiparticle and particle-hole optical models is emphasized.

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  • Received 27 December 2012

DOI:https://doi.org/10.1103/PhysRevC.87.044330

©2013 American Physical Society

Authors & Affiliations

M. H. Urin*

  • National Research Nuclear University “MEPhI,” 115409 Moscow, Russia

  • *urin@theor.mephi.ru

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Vol. 87, Iss. 4 — April 2013

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