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

J. Okolowicz (1) , Y.H. Lam , M. Ploszajczak (2) , A.O. Macchiavelli (3) , N.A. Smirnova (4)

1 Institute of Nuclear Physics
2 GANIL - Grand Accélérateur National d'Ions Lourds
3 NSD - Nuclear Science Division [LBNL Berkeley]
4 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

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 ($20 \leq A \leq 28$).

Domaines: Physique Nucléaire Théorique [nucl-th]; Physique Nucléaire Expérimentale [nucl-ex]

J. Okolowicz, Y.H. Lam, M. Ploszajczak, A.O. Macchiavelli, N.A. Smirnova. Consistent analysis of one-nucleon spectroscopic factors involving weakly- and strongly-bound nucleons. Physics Letters B, 2016, ⟨10.1016/j.physletb.2016.03.086⟩. ⟨in2p3-01230204⟩