Ab initio shell-model calculation for ^{18}O in a restricted no-core model space

Details Ab initio shell-model calculation for ^{18}O in a restricted no-core model space Ab initio shell-model calculation for ^{18}O in a restricted no-core model space

2009-02-12

arxiv.org/abs/0902.2169v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures

Scientific paper

We perform an ab initio shell-model calculation for ^{18}O in a restricted no-core model space, microscopically deriving a two-body effective interaction and introducing a minimal refinement of one-body energies in the spsd or spsdpf model space. Low-lying energy levels, except for the experimental 0_{2}^{+} and 2_{3}^{+} states, are better described in the spsdpf space than in the spsd space. The structure of low-lying energy levels is discussed with an emphasis on many-particle many-hole states beyond the four-particle two-hole configuration.

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