<i>p</i>-shell nuclei in a (0+2)ħω model space. I. Method

Abstract

An empirical effective interaction for the A=4--16 p-shell nuclei in the complete (0+2)\ensuremath{\Elzxh}\ensuremath{\omega} model space is presented, which also reproduces the predominant 2\ensuremath{\Elzxh}\ensuremath{\omega} intruder states. The results are not spoiled by the mixing catastrophe. The inclusion of 2\ensuremath{\Elzxh}\ensuremath{\omega} states also leads to a new feature not encountered before in smaller model spaces, i.e., the appearance of radially excited states. The latter can be observed experimentally in certain cases.