Abstract
Differential cross sections for the (p,n)(g.s.) reaction have been measured at MeV with a gas-cell target. Differential cross sections for (p,n) reactions on leading to the first three levels in have been obtained with an isotopically-enriched graphite target for bombarding energies of 25.7, 35, and 45 MeV. The (p,n)(2.31 MeV) cross sections have been analyzed with Lane-model distorted-wave Born approximation calculations to extract energy-dependent well depths for the isovector part of the optical potential. These isovector well depths have been combined with a set of isoscalar optical-potential parameters derived from elastic proton scattering on . The resulting optical potential has been used in microscopic distorted-wave Born approximation analyses of the (p,n) differential cross sections. Strengths for the isovector central and and isovector tensor components of the effective interaction have been extracted. A comparison of the isospin-symmetric (p,n)(g.s.), (p,n)(g.s.), and (p,p′)(2.31 MeV) reactions has been made, and unexpected differences among the angular distributions are found.
[NUCLEAR REACTIONS (p,n)(g.s.), MeV, measured , , . (p,n)(g.s., 2.31, 3.95 MeV), MeV, measured , , . Gas target, enriched target, Lane-model analysis, microscopic DWBA analysis.]
- Received 25 July 1983
DOI:https://doi.org/10.1103/PhysRevC.29.764
©1984 American Physical Society