Microscopic self-energy of \({}^{40}\)Ca from the charge-dependent Bonn potential

• Published in: arXiv.org 2011-08
• Main Authors: Dussan, H, Waldecker, S J, Dickhoff, W H, Müther, H, Polls, A
• Format: Article
• Language: English
• Subjects: Absorption; Angular momentum; Dependence; Energy
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1108.0705

The effects of short-range correlations on the nucleon self-energy in \(^{40}\)Ca are investigated using the charge-dependent Bonn (CDBonn) interaction. Comparisons are made with recent results for the self-energy of \(^{40}\)Ca derived from the dispersive optical-model (DOM). Particular emphasis is placed on the non-locality of the imaginary part of the microscopic self-energy which suggests that future DOM analyses should include this feature. In particular, data below the Fermi energy appear sensitive to the implied orbital angular momentum dependence of the self-energy. Quasiparticle properties obtained for the CDBonn interaction are substantially more mean-field-like than the corresponding DOM results with spectroscopic factors larger by about 0.2 e.g. Reaction cross sections obtained from the microscopic self-energy for scattering energies up to 100 MeV indicate that an adequate description of volume absorption is obtained while a considerable fraction of surface absorption is missing. The analysis of the non-locality of the imaginary part of the microscopic self-energy suggests that a simple gaussian provides an adequate description, albeit with rather large values for \(\beta\), the non-locality parameter.