Abstract
Studies of nuclear matter in abnormal conditions have a fascinating prospect: with the advent of relativistic ion accelerators we now have an opportunity to investigate the properties of high-density nuclear matter, essentially in central collisions of two heavy ions. Since the compressed matter formed during the collisions has a very short lifetime, one is forced to learn its characteristics only through the emitted products and, to relate the observed product particles to the nature of the highly compressed stage of nuclear matter, one needs some theoretical models. We shall report here on a Monte Carlo calculation assuming successive independent baryon-baryon collisions to take place in cascade during the time of the nuclear process. We shall apply it to the study of central collisions between two a~ nuclei at laboratory energies of 1 and 2 GeV/nucleon, which fall in the region of current experimental interest (1). Specifically, we shall concentrate on the time evolution of the nuclearmatter density during the collision and the average pion multiplicity. The present calculation embodies three main features:
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