Excitation spectra of exotic nuclei in a self-consistent phonon-coupling model
Abstract
We explore giant resonance spectra and low-lying dipole strength in the Ni and Sn chains from proton rich to very neutron rich isotopes, relevant in astrophysical reaction chains. For the theoretical description we employ the random-phase approximation (RPA) plus many-body effects through a phonon coupling model with optimized selection of phonons. The nuclear force is based on the Skyrme-Hartree-Fock energy functional carried consistently through all steps of modelling. The main effect of phonon coupling is a broadening of the spectral distributions (collisional width). This broadening is particularly dramatic for low-lying dipole strength in very neutron rich nuclei delivering there a qualitative change of the spectra.
Keywords
Cite
@article{arxiv.1809.02247,
title = {Excitation spectra of exotic nuclei in a self-consistent phonon-coupling model},
author = {N. Lyutorovich and V. Tselyaev and J. Speth and P. -G. Reinhard},
journal= {arXiv preprint arXiv:1809.02247},
year = {2018}
}
Comments
14 pages, 19 figures