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arXiv · 2102.11505

Effects of ground-state correlations on damping of giant dipole resonaces in $LS$ closed shell nuclei

Mitsuru Tohyama
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Abstract

The effects of ground-state correlations on the damping of isovector giant dipole resonances in $LS$ closed shell nuclei $^{16}$O and $^{40}$Ca are studied using extended random-phase-approximation (RPA) approaches derived from the time-dependent density-matrix theory. It is pointed out that unconventional two-body amplitudes of one particle--three hole and three particle--one hole types which are neglected in most extended RPA theories play an important role in the fragmentation of isovector dipole strength.

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Mitsuru Tohyama. 2022-02-23. Effects of ground-state correlations on damping of giant dipole resonaces in $LS$ closed shell nuclei. https://arxiv.org/abs/2102.11505

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