Gamow Shell Model Description of Weakly Bound Nuclei and Unbound Nuclear States

Abstract

We present the study of weakly bound, neutron-rich nuclei using the nuclear shell model employing the complex Berggren ensemble representing the bound single-particle states, unbound Gamow states, and the non-resonant continuum. In the proposed Gamow Shell Model, the Hamiltonian consists of a one-body finite depth (Woods-Saxon) potential and a residual two-body interaction. We discuss the basic ingredients of the Gamow Shell Model. The formalism is illustrated by calculations involving {\it several} valence neutrons outside the double-magic core: ${}^{6-10}$He and ${}^{18-22}$O.

Comments: 19 pages, 20 encapsulated PostScript figures