A New Type of Shape Instability of Hot Nuclei and Prompt Nuclear Fragmentation

Details A New Type of Shape Instability of Hot Nuclei and Prompt Nuclear Fragmentation A New Type of Shape Instability of Hot Nuclei and Prompt Nuclear Fragmentation

1998-10-23

arxiv.org/abs/nucl-th/9810063v1

Phys.Rev.Lett. 82 (1999) 5008-5011

Physics

Nuclear Physics

Nuclear Theory

11 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.82.5008

A novel mechanism of prompt nuclear fragmentation is proposed. Assuming micro-canonical or canonical equilibrium, it is shown that a strong enhancement of the accessible phase space volume, due to the diffuceness of the nuclear surface, leads to dynamical instabilities of hot nuclei and to prompt fragmentation. Equations are derived for the transition temperature T_T, for which the thermodynamical surface tension vanishes, as well as for the thermodynamical fissility parameter chi_td.

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