Temperature and energy partition in fragmentation

Details Temperature and energy partition in fragmentation Temperature and energy partition in fragmentation

1998-12-07

arxiv.org/abs/nucl-th/9812016v1

Phys.Rev.C59:285-294,1999

Physics

Nuclear Physics

Nuclear Theory

23 pages, 11 figs

Scientific paper

10.1103/PhysRevC.59.285

We study fragmentation of small atomistic clusters via molecular dynamics. We calculate the time scales related to fragment formation and emission. We also show that some degree of thermalization is achieved during the expansion process, which allows the determination of a local temperature. In this way we can calculate the break-up temperature as a function of excitation energy, i.e. the fragmentation caloric curve. Fragmentation appears as a rather constant temperature region of the caloric curve. Furthermore, we show that different definitions of temperature, related to different degrees of freedom, yield very similar values.

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