Quasiparticle Resonances in the BCS Approach

Details Quasiparticle Resonances in the BCS Approach Quasiparticle Resonances in the BCS Approach

2005-05-03

arxiv.org/abs/nucl-th/0505011v1

Nucl.Phys. A771 (2006) 93-102

Physics

Nuclear Physics

Nuclear Theory

14 pages, 2 figures

Scientific paper

10.1016/j.nuclphysa.2006.03.003

We present a simple method for calculating the energies and the widths of quasiparticle resonant states. The method is based on BCS equations solved in the Berggren representation. In this representation the quasiparticle resonances are associated to the Gamow states of the mean field. The method is illustrated for the case of neutron-rich nuclei $^{20-22}$O and $^{84}$Ni. It is shown that the contribution of the continuum coupling to the pairing correlations is small and largely dominated by a few resonant states close to the continuum threshold.

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