Two statistical approaches to nuclear disassembly

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Abstract
Two statistical approaches to nuclear disassembly are compared. One is based on a sequential chain of binary decays, and the other on the microcanonical treatment of fragment configurations in a fixed freeze-out volume. The two approaches are formulated in a manner to facilitate this comparison. A volume related to the sequential approach is defined. This volume is interpreted in terms of entropy conservation. Effective freeze-out volumes are defined for various yields. From this it is shown how similar predictions can arise from the approaches which are based on mutually incompatible assumptions. Differences in Coulomb effects are explored. A detailed comparison of two sets of predictions is made for a test example, and the reasons behind specific differences are studied. It is suggested that such differences can serve as experimental signatures to distinguish which approach is more appropriate.

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