Pion Elastic and Inelastic Scattering from exp 40 exp 42 exp 44 exp 48 Ca and exp 54 Fe

摘要

Differential cross sections were measured for pion elastic and inelastic scattering from exp 40 exp 42 exp 44 exp 48 Ca and exp 54 Fe at T/sub pi / = 116.0, 180.0, and 292.5 MeV. The ground states were analyzed using a Kisslinger potential with and without free parameters. The low-lying collective states were analyzed using a distorted wave impulse approximation with no free parameters and transition densities obtained from electron and proton scattering data. These analyses adequately reproduced the pion scattering data. Ground-state neutron density rms radii were estimated and compared with a theoretical calculation and analyses of proton, alpha, pion, and pionic x-ray data. Proton and neutron multipole matrix elements were extracted from the 2 sub 1+ and 3 sub 1- states in exp 42 exp 44 exp 48 Ca and compared with tabulated electromagnetic matrix elements. Model-dependent errors are examined by comparing the results of calculations using collective-model form factors with those using form factors fitted to electron and proton scattering data. 69 references. (ERA citation 09:021314)