Collective Excitations and Ground State Correlations

Details Collective Excitations and Ground State Correlations Collective Excitations and Ground State Correlations

1994-08-18

arxiv.org/abs/nucl-th/9408020v1

Nucl.Phys. A587 (1995) 77-91

Physics

Nuclear Physics

Nuclear Theory

16 Pages + 2 Figures (included at the end as uuencoded ps-files), TU-180894

Scientific paper

10.1016/0375-9474(94)00807-Y

A generalized RPA formalism is presented which treats pp and ph correlations on an equal footing. The effect of these correlations on the single-particle Green function is discussed and it is demonstrated that a self-consistent treatment of the single-particle Green function is required to obtain stable solutions. A simple approximation scheme is presented which incorporates for this self-consistency requirement and conserves the number of particles. Results of numerical calculations are given for $^{16}$O using a G-matrix interaction derived from a realistic One-Boson-Exchange potential.

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