Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-04-19
Eur.Phys.J. A14 (2002) 287-294
Physics
Nuclear Physics
Nuclear Theory
15 pages including 7 figures, to appear in The European Physical Journal A
Scientific paper
Transients in the fission of highly excited nuclei are studied in the framework of the Langevin equation. Time-dependent fission widths are calculated which show that after the initial transients, a steady flow towards the scission point is established not only for nuclei which have fission barriers but also for nuclei which have no fission barrier. It is shown from a comparison of the transient time and the fission life time that fission changes from a diffusive to a transient dominated process over a certain transition region as a function of the spin of the fissioning nucleus. Multiplicities of prescission neutrons are calculated in a statistical model with as well as without a single swoop description of fission and they are found to differ in the transition region. We however find that the difference is marginal and hence a single swoop picture of fission though not strictly valid in the transition region can still be used in the statistical model calculations.
Chaudhuri Gargi
Pal Santanu
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