Microscopic Calculations of the Spectra of Light Nuclei

Details Microscopic Calculations of the Spectra of Light Nuclei Microscopic Calculations of the Spectra of Light Nuclei

1993-04-27

arxiv.org/abs/nucl-th/9304025v1

Phys.Rev.C48:1083-1091,1993

Physics

Nuclear Physics

Nuclear Theory

18 text pages, 6 Postscript figures (available upon request), University of Arizona preprint (number unassigned)

Scientific paper

10.1103/PhysRevC.48.1083

We perform large-space shell-model calculations for the low-lying energy spectra of a few light nuclei, $^4\mbox{He}$, $^5\mbox{He}$, $^6\mbox{Li}$ and $^7\mbox{Li}$, in a no-core model space with a realistic effective two-body interaction (Brueckner G-matrix). Our G-matrices are calculated for the Reid-soft-core potential in a harmonic oscillator basis. Single-particle ``-U'' insertions are replaced by two-particle ``-U'' insertions and are included in the G matrix calculations, which sum them to all orders. With the starting energy of the G-matrix chosen to give approximately the experimental binding energy, we obtain nuclear energy spectra which are in reasonable agreement with experiment. We also investigate the dependence of our results on the size of the model space and on the harmonic oscillator basis parameter ($\hbar\Omega$).

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