The Pairing interaction in nuclei: comparison between exact and approximate treatments

Details The Pairing interaction in nuclei: comparison between exact and approximate treatments The Pairing interaction in nuclei: comparison between exact and approximate treatments

2002-06-06

arxiv.org/abs/nucl-th/0206016v2

Physics

Nuclear Physics

Nuclear Theory

18 pages and 1 figure. Some equations corrected. One new author

Scientific paper

As a model for a deformed nucleus the many level pairing model (picket fence model with ~100 levels) is considered in four approximations and compared to the exact solution given by Richardson long time ago. It is found that, as usual, the number projected BCS method improves over standard BCS but that it is much less accurate than the more sophisticated many-body-approaches which are Coupled Cluster Theory (CCT) in its SUB2 version or Self-Consistent Random Phase Approximation (SCRPA).

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