Off-shell structures of nucleon-nucleon t matrices and their influence on nucleon-nucleus elastic scattering observables
- Natural Arts and Sciences, Eckerd College, St. Petersburg, Florida 33711 (United States)
- Institute of Nuclear and Particle Physics, and Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701 (United States)
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The sensitivity of nucleon-nucleus elastic scattering observables to the off-shell structure of nucleon-nucleon t matrices, derived from realistic NN potentials, is investigated within the context of a full-folding model based on the impulse approximation. Our study uses recently developed NN potential models, which describe a subset of the NN data base with a {chi}{sup 2} per datum {approximately}1, which means that the NN t matrices are essentially on-shell equivalent. We calculate proton-nucleus elastic scattering observables for {sup 16}O, {sup 40}Ca, and {sup 208}Pb between 100 and 200 MeV laboratory energy. We find that the elastic scattering observables are insensitive to off-shell differences of the employed NN t matrices. A more detailed investigation of the scattering equation and the optical potential as given in a factorized approximation reveals that the elastic scattering observables do not sample the NN t matrices very far off-shell where they exhibit differences. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 570324
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 57; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sensitivity of nucleon-nucleus scattering to the off-shell behavior of on-shell equivalent {ital NN} potentials
Deuteron effects in nucleon-nucleus scattering at intermediate energies