FRAGMENTATION CROSS SECTIONS IN HEAVY ION COLLISIONS

Abstract

The fragment cross sections are calculated for reactions of Ne collisions with C , Al , Cu , Sn , Ta , and Pb targets at 600 Mev/nucleon using the the isospin-dependent Boltzmann-Langevin equation. We found that the production cross sections for fragments Z = 2 to 9 are qualitatively reproduced by the present calculations except for C target. In order to understand the effects of heavy ion interaction with biomolecules well, we calculate the fragmentation cross sections for reactions of 12 C + 2 H , 12 C , 14 N , 16 O at beam energies from 50 to 100 MeV/nucleon. It is found that fragment species increase approximately with increasing target mass. The obvious increment of the fragment cross sections for heavier targets at the beam energies from 50 to 80 MeV/nucleon are shown.