INVESTIGATION OF NEUTRON EMISSION FROM RELATIVISTIC HEAVY-ION INTERACTIONS BY NUCLEAR TRACKS

Fast neutrons produced in 44 and 22 GeV C-12+Cu interactions have been recorded and analysed with a CR-39 detector stack, The irradiation of the CR-39 stack to fast neutrons was carried out at the accelerator S ynchrophasotron, Joint Institute for Nuclear Research, Dubna, Russia, Areal and volume densities of tracks induced by fast neutrons in the C R-39 at different positions and for different etching time have been m easured, The neutron production ratio of 44 GeV to 22 GeV C-12+Cu inte ractions has been obtained, which is 2.17 +/- 0.30 by areal track dens ity, or 2.12+/-0.33 by step etch technique, or 2.03+/-0.34 by volume t rack density measurement. These results confirm that the production ra te at 44 GeV C-12+Cu interactions is more than theoretical estimation.