Elastic and inelastic scattering of pi mesons on Li-7 nuclei

Within the diffraction theory of multiple scattering, the differential cros s sections for elastic anti inelastic pion scattering on a Li-7 nucleus are calculated for the case where the final nucleus is either in the ground or iri the first excited state. The nuclear wave function is set to that in t he at cluster model. The sensitivity of the calculated observables to varia tions in the type of the wave functions for the alpha-particle and the trit on cluster and for their relative motion is investigated. Various multiplic ities of scattering and rescattering on the clusters constituting the Li-7 nucleus are taken into account, and their contributions to the cross sectio n are revealed. The results of the calculations are compared with experimen tal data at E-pi = 143, 164, and 194 MeV. (C) 2001 MAIK "Nauka/Interperiodi ca".