Shell model study of the neutron-rich nuclei around<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>28</mml:mn><mml:mn/></mml:math>

We describe the properties of the neutron-rich nuclei around $N=28$ in the shell mode framework. The valence space includes the $\mathrm{sd}$ shell for protons and the $\mathrm{pf}$ shell for neutrons without any restriction. Good agreement is found with the available experimental data. The $N=28$ shell closure persists, even if eroded by the large neutron excess. The calculations predict that ${}^{40}$S and ${}^{42}$S are deformed with $\ensuremath{\beta}=0.29$ and $\ensuremath{\beta}=0.32$ respectively.

Hali tarjima qilinmagan