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

Autor:	Michel Waroquier, D. Van Neck, Y. Dewulf, L. Van Daele
Rok vydání:	1997
Předmět:	Physics Nuclear and High Energy Physics Nuclear Theory Fermi level FOS: Physical sciences Self consistent Residual Exponential function Nuclear Theory (nucl-th) Formalism (philosophy of mathematics) symbols.namesake medicine.anatomical_structure symbols medicine Statistical physics Nucleus
Zdroj:	Physics Letters B. 396:7-14
ISSN:	0370-2693
DOI:	10.1016/s0370-2693(97)00135-4
Popis:	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. Comment: 11 pages, 3 postscript figures, Revtex, uses epsf.sty, to be published in Physics Letters B
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::273116c13a226afc3bdd78d723a4f8f3 https://doi.org/10.1016/s0370-2693(97)00135-4 Zobrazit plný text záznamu Full Text from ScienceDirect