Chaos modified wall formula damping of the surface motion of a cavity undergoing fissionlike shape evolutions

Abstract

The chaos weighted wall formula developed earlier for systems with partially chaotic single particle motion is applied to large amplitude collective motions similar to those in nuclear fission. Considering an ideal gas in a cavity undergoing fission-like shape evolutions, the irreversible energy transfer to the gas is dynamically calculated and compared with the prediction of the chaos weighted wall formula. We conclude that the chaos weighted wall formula provides a fairly accurate description of one body dissipation in dynamical systems similar to fissioning nuclei. We also find a qualitative similarity between the phenomenological friction in nuclear fission and the chaos weighted wall formula. This provides further evidence for one body nature of the dissipative force acting in a fissioning nucleus.

8 pages (RevTex), 7 Postscript figures, to appear in Phys.Rev.C., Section I (Introduction) is modified to discuss some other works (138 kb)

References in corpus (1)

• The excitation of a quantum gas of independent particles under periodic perturbation in integrable or non-integrable potential

Cited by in corpus (8)

• Future of Nuclear Fission Theory
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• Fission widths of hot nuclei from Langevin dynamics
• Alleviating the inconsistencies in modelling decay of fissile compound nuclei
• A dynamical model calculation to reconcile the nuclear fission lifetime from different measurement techniques
• Quest for consistent modelling of statistical decay of the compound nucleus
• Dissipation in finite Fermi systems