Long-range correlations in finite nuclei: comparison of two self-consistent treatments

Details Long-range correlations in finite nuclei: comparison of two self-consistent treatments Long-range correlations in finite nuclei: comparison of two self-consistent treatments

1997-01-29

arxiv.org/abs/nucl-th/9701059v1

Phys.Lett. B396 (1997) 7-14

Physics

Nuclear Physics

Nuclear Theory

11 pages, 3 postscript figures, Revtex, uses epsf.sty, to be published in Physics Letters B

Scientific paper

10.1016/S0370-2693(97)00135-4

Long-range correlations, which are partially responsible for the observed fragmentation and depletion of low-lying single-particle strength, are studied in the Green's function formalism. The self-energy is expanded up to second order in the residual interaction. We compare two methods of implementing self-consistency in the solution of the Dyson equation beyond Hartree-Fock, for the case of the 16O nucleus. It is found that the energy-bin method and the BAGEL method lead to globally equivalent results. In both methods the final single-particle strength functions are characterized by exponential tails at energies far from the Fermi level.

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