Mass independence and asymmetry of the reaction: Multi-fragmentation as an example

Abstract

We present our recent calculations on fragmentation by varying the mass asymmetry of the colliding nuclei using the reactions of 26Fe56 +44 Ru96 (η = 0.2), 24Cr50 + 44 Ru102 (η = 0.3), 20Ca40 +50 Sn112 (η = 0.4), 16S32 +50 Sn120 (η = 0.5), 14Si28 +54 Xe124 (η = 0.6), 8O16 +54 Xe136 (η = 0.7) at a fixed center of mass energy Ec.m. = 250 MeV/nucleon. For the present study, total mass of the system is kept constant (ATOT = 152). The measured distributions are given as a function of the total charge of all projectile fragments, Zbound. The well known trend of rise and fall in the multiplicity of intermediate mass fragments for symmetric colliding nuclei is reproduced nicely. Such trends are, however missing for larger asymmetric reactions.