Inelastic interactions of pions with the complex nuclei of emulsions

Abstract

Cross sections for inelastic interactions of pions with complex nuclei of emulsion have been measured at various pion energies in the (3,3) resonance energy region. The results have been interpreted in terms of the pion-nucleon interaction cross section through Fraenkel's isobar model using the optical model formalism. A detailed analysis of the stars produced by the positive pions in that energy range was also made and the energy and the opening angle distributions were fitted with those obtained from the Monte Carlo calculations based on the isobar model. Good agreement in each case supports the isobar model for the inelastic interaction of pions in complex nuclei.