Microscopic self-energy calculations and dispersive optical-model potentials

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...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2011-09, Vol.84 (3), Article 034616
Main Authors: Waldecker, S. J., Barbieri, C., Dickhoff, W. H.
Format: Article
Language:English
Subjects:
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
APPROXIMATIONS
ASYMMETRY
BARYON-BARYON INTERACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOUND STATE
CALCIUM 40
CALCIUM 48
CALCIUM 60
CALCIUM ISOTOPES
CALCULATION METHODS
CHARGE EXCHANGE
COMPARATIVE EVALUATIONS
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY
EQUATIONS
EVALUATION
EVEN-EVEN NUCLEI
EXPLORATION
FADDEEV EQUATIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
OPTICAL MODELS
ORBITAL ANGULAR MOMENTUM
PARITY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
RADIOISOTOPES
RANDOM PHASE APPROXIMATION
SCATTERING
SELF-ENERGY
STABLE ISOTOPES
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Summary: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.
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.84.034616