  A theory of nucleus-nucleus collisions has been developed for kinetic
energies substantially in excess of the binding energy. The very high pressure
produced in the compound system as a result of the fusion of the two colliding
nuclei is the reason for the subsequent hydrodynamic expansion of the nuclear
medium. The energy and angular distributions of the reaction products are
investigated. The charge distribution is also determined in the case where the
nucleon and ion components of the reaction products are predominant. A solution
is found for the expansion into vacuum of a sphere in which the initially
uniformly distributed material is initially at rest and at an ultrarelativistic
temperature.

Nuclear Theory