Nuclear Interactions at Energies over 1000 Bev

Measurements on two jets, a $0+36p$ jet with primary energy about 2500 Bev and a $4+29\alpha$ jet with primary energy about 8000 Bev/nucleon, are presented. It is shown that the main features of the angular distribution of particles from these two primary jets and a third energetic secondary jet can be explained satisfactorily by the model in which mesons created in a nucleon-nucleon collision are considered to be radiated isotropically from two centers. Further implications of this model are discussed; in particular it is shown that definite restrictions are imposed on the values of energy and angle of emission of secondary particles; the average transverse momentum is predicted to be relatively constant but to have a lower value not only in the forward and backward directions but also around 90° in the center-of-mass system of the two colliding nucleons. While it is shown that the available experimental data are in accord with these predictions, more events with energies in the region of 1000 Bev must be studied before a definite conclusion can be reached.