Local optical model studies of pion-nucleus scattering

Abstract

Local optical model calculations have been carried out for elastic andinelastic scattering of π± from 40,42,44,48Ca and 54Feat pion energies atop, above and below the Δ resonance. The elasticstudies resulted in considerable ambiguities in the parameter values.Using the best-fit parameters, zero-range DWBA calculations have beencarried out for inelastic scattering of π± leading to the lowest 2+ and 3- states of these nuclei. Transition strengths extracted frominelastic scattering, compared with known values, remove the ambiguityfound for elastic scattering, making the simple model useful for otherreaction studies with pions.