Abstract
The neutron dispersive optical model potential that was developed previously from an analysis of extensive data on the neutronCa system is adapted to the neutronAr system by adjusting the central depth of the local equivalent of the Hartree-Fock-type potential. The nAr data for this adjustment are the total cross section for 11<E<40 MeV and the centroid energy for the observed single-particle and single-hole states of the valence shells. The resulting potential for nAr yields good predictions for the particle-hole gap for the valence shells and for the energy-averaged s-wave and p-wave scattering functions in the resonance region. However, it gives a poor prediction for the total cross section from 2 to 11 MeV. A similar discrepancy was observed earlier for . A parity dependence in the surface imaginary potential is suggested from a more careful examination of the s-wave and p-wave scattering functions for ; that parity dependence gives a good prediction of the total cross section for 2 to 11 MeV.
- Received 27 August 1990
DOI:https://doi.org/10.1103/PhysRevC.44.657
©1991 American Physical Society