Microscopic optical potential for {alpha}-nucleus elastic scattering in a Dirac-Brueckner-Hartree-Fock approach

Journal Article · Mon Dec 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.064613· OSTI ID:21199442

Wei, Zou ^[1]; Yuan, Tian ^[1]; Zhongyu, Ma ^[1]

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1. China Institute of Atomic Energy, P.O. Box 275(18), Beijing 102413 (China)

The microscopic optical model potential (OMP) of {alpha}-nucleus elastic scattering based on a double-folding model (DFM) is studied. The nucleon OMPs in nuclear matter as well as the nucleon-nucleon (NN) effective interaction are calculated in the framework of the Dirac-Brueckner-Hartree-Fock (DBHF) approach, in which the density and energy dependence is parametrized by polynomial expansions. The microscopic OMP of nucleus-nucleus scattering is obtained by doubly folding the complex NN effective interaction with respect to the densities of both projectile and target nuclei. An improved local-density approximation is adopted to take account of the finite-range correction. Renormalization factors on the real and imaginary OMP are introduced to obtain the best fit to the experimental data. A systematic analysis of {sup 4}He elastic scattering off {sup 12}C, {sup 16}O, {sup 28}Si, and {sup 40}Ca is performed. The calculated cross sections over a wide range of incident energies and scattering angles are in good agreement with the experimental data, which confirms the applicability of this model. Moreover, for the same projectile and target, the renormalization factors are found to be almost constant at various incident energies.

• OSTI ID: 21199442
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
CARBON 12
CORRECTIONS
CROSS SECTIONS
DENSITY
ELASTIC SCATTERING
ENERGY DEPENDENCE
FOLDING MODEL
HARTREE-FOCK METHOD
HELIUM 4
INTERACTIONS
NUCLEAR MATTER
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
OPTICAL MODELS
OXYGEN 16
POLYNOMIALS
RENORMALIZATION
SILICON 28
SIMULATION