A Cloud Chamber Study of High Energy Nuclear Interactions of Cosmic Ray Particles (I)–A Possible Evidence of Successive Collisions in Carbon Nuclei

Abstract

In an attempt to study the high energy nuclear interactions of cosmic ray particles, a momentum cloud chamber was operated at Mt. Norikura, 2740 meter high above the sea level, and about ten thousand pairs of stereoscopic pictures of the events were taken. Selected showers were transformed to the C.M.S. of the collisions to obtain the intrinsic features of the nuclear interactions. In the energy range around 100 Gev of incident nucleons, the successive collision model in carbon nuclei, rather than the complete collision model, seems to be consistent with the experimental evidences.