Consistent analysis of one-nucleon spectroscopic factors involving weakly- and strongly-bound nucleons

Abstract

There is a considerable interest in understanding the dependence of one-nucleon removal cross sections on the asymmetry of the neutron $S_n$ and proton $S_p$ separation energies, following a large amount of experimental data and theoretical analyses in a framework of sudden and eikonal approximations of the reaction dynamics. These theoretical calculations involve both the single-particle cross section and the shell-model description of the projectile initial state and final states of the reaction residues. The configuration mixing in shell-model description of nuclear states depends on the proximity of one-nucleon decay threshold but does it depend sensitively on $S_n-S_p$? To answer this question, we use the shell model embedded in the continuum to investigate the dependence of one-nucleon spectroscopic factors on the asymmetry of $S_n$ and $S_p$ for mirror nuclei ${}^{24}$Si, ${}^{24}$Ne and ${}^{28}$S, ${}^{28}$Mg and for a series of neon isotopes ($20\le A\le 28$).

Comments: 5 pages, 3 figures