The angular distribution of secondary particles in high energy nuclear collisions with heavy nuclei of photographic emulsion

Abstract

61 jets produced by singly charged and neutral particles of cosmic radiation in photographic emulsion in collisions with heavy nuclei (Nh>8) have been investigated. Primary energies and anisotropy parameters for angular distributions of secondary particles have been calculated. The results were compared with those obtained formerly for events with mall evaporation (Nh⩽5). It might be stated that the energy dependence of the anisotropy for both samples of jets is quite similar. The mean anisotropy is however smaller than that predicted by hydrodynamical theories. It was stated that in the same energy interval the anisotropy for particular events differ very much and that the main contribution to high anisotropy is given by the cases in which the angular distribution dN/d(log tgθ) is not a normal one, but shows two separated maxima. The results were discussed from the point of vew of the two-centre model.