Cosmic Ray Interactions in Paraffin and Lead

Abstract

Abstract Nuclear interactions of cosmic rays under paraffin and lead have been studied by means of a counter controlled multiplate cloud chamber. The lead plates inside the chamber served as producer and analyser. A search has been made for the possible transition effect of nuclear interaction in lighter elements using charged components for triggering and to compare it with a previously observed apparent transition effect in graphite for neutron shower using coincidence of neutron counters. The results show a continuous increase of nuclear interaction with increasing thickness of paraffin absorber up to 30.4 gcm-2. A similar rise is also observed under 11.3 gem-2 of Pb.