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Title: Microscopic self-energy calculations and dispersive optical-model potentials

Abstract

Nucleon self-energies for {sup 40,48,60}Ca isotopes are generated with the microscopic Faddeev-random-phase approximation (FRPA). These self-energies are compared with potentials from the dispersive optical model (DOM) that were obtained from fitting elastic-scattering and bound-state data for {sup 40,48}Ca. The ab initio FRPA is capable of explaining many features of the empirical DOM potentials including their nucleon asymmetry dependence. The comparison furthermore provides several suggestions to improve the functional form of the DOM potentials, including among others the exploration of parity and angular momentum dependence. The nonlocality of the FRPA imaginary self-energy, illustrated by a substantial orbital angular momentum dependence, suggests that future DOM fits should consider this feature explicitly. The roles of the nucleon-nucleon tensor force and charge-exchange component in generating the asymmetry dependence of the FRPA self-energies are explored. The global features of the FRPA self-energies are not strongly dependent on the choice of realistic nucleon-nucleon interactions.

Authors:
;  [1];  [2];  [3]
  1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
  2. Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)
  3. (Japan)
Publication Date:
OSTI Identifier:
21596767
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.84.034616; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASYMMETRY; BOUND STATE; CALCIUM 40; CALCIUM 48; CALCIUM 60; CHARGE EXCHANGE; COMPARATIVE EVALUATIONS; ELASTIC SCATTERING; EXPLORATION; FADDEEV EQUATIONS; NUCLEON-NUCLEON INTERACTIONS; NUCLEONS; OPTICAL MODELS; ORBITAL ANGULAR MOMENTUM; PARITY; RANDOM PHASE APPROXIMATION; SELF-ENERGY; ALKALINE EARTH ISOTOPES; ANGULAR MOMENTUM; APPROXIMATIONS; BARYON-BARYON INTERACTIONS; BARYONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CALCIUM ISOTOPES; CALCULATION METHODS; ELEMENTARY PARTICLES; ENERGY; EQUATIONS; EVALUATION; EVEN-EVEN NUCLEI; FERMIONS; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; INTERMEDIATE MASS NUCLEI; ISOTOPES; LIGHT NUCLEI; MATHEMATICAL MODELS; NUCLEI; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; RADIOISOTOPES; SCATTERING; STABLE ISOTOPES

Citation Formats

Waldecker, S. J., Dickhoff, W. H., Barbieri, C., and Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198. Microscopic self-energy calculations and dispersive optical-model potentials. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.84.034616.
Waldecker, S. J., Dickhoff, W. H., Barbieri, C., & Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198. Microscopic self-energy calculations and dispersive optical-model potentials. United States. doi:10.1103/PHYSREVC.84.034616.
Waldecker, S. J., Dickhoff, W. H., Barbieri, C., and Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198. Thu . "Microscopic self-energy calculations and dispersive optical-model potentials". United States. doi:10.1103/PHYSREVC.84.034616.
@article{osti_21596767,
title = {Microscopic self-energy calculations and dispersive optical-model potentials},
author = {Waldecker, S. J. and Dickhoff, W. H. and Barbieri, C. and Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198},
abstractNote = {Nucleon self-energies for {sup 40,48,60}Ca isotopes are generated with the microscopic Faddeev-random-phase approximation (FRPA). These self-energies are compared with potentials from the dispersive optical model (DOM) that were obtained from fitting elastic-scattering and bound-state data for {sup 40,48}Ca. The ab initio FRPA is capable of explaining many features of the empirical DOM potentials including their nucleon asymmetry dependence. The comparison furthermore provides several suggestions to improve the functional form of the DOM potentials, including among others the exploration of parity and angular momentum dependence. The nonlocality of the FRPA imaginary self-energy, illustrated by a substantial orbital angular momentum dependence, suggests that future DOM fits should consider this feature explicitly. The roles of the nucleon-nucleon tensor force and charge-exchange component in generating the asymmetry dependence of the FRPA self-energies are explored. The global features of the FRPA self-energies are not strongly dependent on the choice of realistic nucleon-nucleon interactions.},
doi = {10.1103/PHYSREVC.84.034616},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}