Entrance channel dependence of fragmentation dynamics in heavy-ion collisions

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.1444· OSTI ID:560979

Das, C B; Das, A ^[1]; Satpathy, M ^[2]; Satpathy, L ^[1]

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1. Institute of Physics, Bhubaneswar 751 005 (India)
2. Department of Physics, Utkal University, Bhubaneswar 751 004 (India)

We study the mechanism of intermediate energy heavy-ion collisions in a picture of tripartition of the total system, using the framework of statistical simultaneous multifragmentation model taking into account the entrance channel characteristics, with no other parameter except density. The relative excitations of the three parts and their contributions to the physical observables such as mean multiplicity for different fragments and total fragment multiplicity are shown as functions of entrance channel properties; namely, the impact parameter, the bombarding energy, and the mass of projectile and target nuclei. As an application we apply the model to describe the data on {sup 40}Ar+{sup 40}Ca and {sup 40}Ar+{sup 197}Au reaction with incident energy varying from 42 to 137 MeV/nucleon, and the intermediate mass fragment production in the {sup 197}Au+{sup 197}Au reaction with incident energies 100 and 400 MeV/nucleon. The importance of the contributions from the spectator parts is clearly demonstrated. It is also shown that the role of the interfragment interaction is important up to bombarding energy 100 MeV/nucleon and a temperature of about 10 MeV. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 560979
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 56; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON 40 REACTIONS
CALCIUM 40 TARGET
DYNAMICS
GOLD 197 REACTIONS
GOLD 197 TARGET
MULTIPLICITY
NUCLEAR FRAGMENTATION
NUCLEAR REACTION KINETICS
STATISTICAL MODELS