Off-shell effects in elastic scattering of protons by nuclei
- Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (USA)
- Institute of Theoretical Physics, University of Utrecht, 3508 TA Utrecht, The Netherlands (NL)
Off-shell effects due to momentum dependence of the optical potential are calculated for the relativistic and no-pair approaches to proton elastic scattering by {sup 40}Ca at 200 and 500 MeV. Optical potentials are based on the optimally factorized impulse approximation using Lorentz-invariant {ital NN} amplitudes calculated from the Utrecht meson-exchange model. A momentum-space solution of the Dirac equation is developed based on helicity amplitudes for nucleon-nucleus scattering. A new algorithm for regulating the Coulomb interaction in momentum-space calculations is developed and it is used in the calculations to determine accurately the Coulomb-corrected phase shifts. Off-shell effects due to momentum dependence of the {ital NN} interaction are found to be of minor importance in the relativistic analysis based on the factorized ({ital t}{rho}) form of the impulse approximation.
- DOE Contract Number:
- FG05-87ER40322
- OSTI ID:
- 5663314
- Journal Information:
- Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:5; ISSN 0556-2813; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
A=39-58
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
ELASTIC SCATTERING
ENERGY RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HELICITY
IMPULSE APPROXIMATION
INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
OPTICAL MODELS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PHASE SHIFT
PROTON REACTIONS
SCATTERING
TARGETS