Isotopic Composition of Fragments in Nuclear Multifragmentation

Details Isotopic Composition of Fragments in Nuclear Multifragmentation Isotopic Composition of Fragments in Nuclear Multifragmentation

2000-02-23

arxiv.org/abs/nucl-ex/0002012v1

Phys.Rev. C62 (2000) 041602

Physics

Nuclear Physics

Nuclear Experiment

10 pages. 4 Postscript figures. Submitted to Physical Review C, Rapid Communication

Scientific paper

10.1103/PhysRevC.62.041602

The isotope yields of fragments, produced in the decay of the quasiprojectile in Au+Au peripheral collisions at 35 MeV/nucleon and those coming from the disassembly of the unique source formed in Xe+Cu central reactions at 30 MeV/nucleon, were measured. We show that the relative yields of neutron-rich isotopes increase with the excitation energy in multifragmentation reaction. In the framework of the statistical multifragmentation model which fairly well reproduces the experimental observables, this behaviour can be explained by increasing N/Z ratio of hot primary fragments, that corresponds to the statistical evolution of the decay mechanism with the excitation energy: from a compound-like decay to complete multifragmentation.

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