Asymmetry dependence of nucleon correlations in spherical nuclei extracted from a dispersive-optical-model analysis

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.064605· OSTI ID:21502789

Mueller, J M; Shane, R; Waldecker, S J; Dickhoff, W H ^[1]; Charity, R J ^[2]; Sobotka, L G ^[1]; Crowell, A S; Esterline, J H; Fallin, B; Howell, C R; Westerfeldt, C ^[3]; Youngs, M ^[4]; Crowe, III, B J ^[5]; Pedroni, R S ^[6]

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1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
2. Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)
3. Department of Physics, Duke University and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708 (United States)
4. National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
5. North Carolina Central University, Durham, North Carolina 27707 (United States)
6. North Carolina A and T State University and Triangle Universities Nuclear Laboratory, Greensboro, North Carolina 27411 (United States)

Neutron elastic-scattering angular distributions were measured at beam energies of 11.9 and 16.9 MeV on {sup 40,48}Ca targets. These data plus other elastic-scattering measurements, total and reaction cross-sections measurements, (e,e{sup '}p) data, and single-particle energies for magic and doubly magic nuclei have been analyzed in the dispersive optical-model (DOM), generating nucleon self-energies (optical-model potentials) that can be related, via the many-body Dyson equation, to spectroscopic factors and occupation probabilities. It is found that, for stable nuclei with N{>=}Z, the imaginary surface potential for protons exhibits a strong dependence on the neutron-proton asymmetry. This result leads to a more modest dependence of the spectroscopic factors on asymmetry. The measured data and the DOM analysis of all considered nuclei clearly demonstrate that the neutron imaginary surface potential displays very little dependence on the neutron-proton asymmetry for nuclei near stability (N{>=}Z).

• OSTI ID: 21502789
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.064605; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ASYMMETRY
CALCIUM 40
CALCIUM 48
CORRELATIONS
CROSS SECTIONS
ELASTIC SCATTERING
MAGIC NUCLEI
MANY-BODY PROBLEM
MEV RANGE 10-100
NEUTRONS
OPTICAL MODELS
PARTICLES
PROBABILITY
PROTONS
SELF-ENERGY
SPECTROSCOPIC FACTORS
SPHERICAL CONFIGURATION
STABILITY
SURFACE POTENTIAL
ALKALINE EARTH ISOTOPES
BARYONS
CALCIUM ISOTOPES
CONFIGURATION
DIMENSIONLESS NUMBERS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
NUCLEI
NUCLEONS
POTENTIALS
SCATTERING
STABLE ISOTOPES