Hf. Arellano et al., SENSITIVITY OF NUCLEAN-NUCLEUS SCATTERING TO THE OFF-SHELL BEHAVIOR OF ON-SHELL EQUIVALENT NN POTENTIALS, Physical review. C. Nuclear physics, 54(5), 1996, pp. 2570-2581
The sensitivity of nucleon-nucleus elastic scattering to the off-shell
behavior of realistic nucleon-nucleon interactions is investigated wh
en on-shell equivalent nucleon-nucleon potentials are used. The study
is based on applications of the full-folding optical model potential f
or an explicit treatment of the off-shell behavior of the nucleon-nucl
eon effective interaction. Applications were made at beam energies bet
ween 40 and 500 MeV for proton scattering from Ca-40 and Pb-208. We us
e the momentum-dependent Paris potential and its local on-shell equiva
lent as obtained with the Gelfand-Levitan and Marchenko inversion form
alism for the two nucleon Schrodinger equation. Full-folding calculati
ons for nucleon-nucleus scattering show moderate fluctuations in the c
orresponding observables. This sets narrow margins within which off-sh
ell features of the nucleon-nucleon interaction can be resolved. Based
on these results, inversion potentials were also constructed directly
from phenomenological phase shifts (SM94). Their use in nucleon-nucle
us scattering at intermediate energies provides an improved descriptio
n of the data relative to those obtained from current realistic potent
ial models.