A critical analysis of the modelling of dissipation in fission
arXiv:nucl-ex/0302003 · doi:10.1016/j.nuclphysa.2004.09.123
Abstract
The time-dependent flux over the fission barrier of an excited nucleus under the influence of dissipation is investigated. Characteristic features of the evolution of the amplitude of the probability distribution and the velocity profile at the fission barrier are derived. Analytical results are compared to numerical Langevin calculations and used to develop a new analytical approximation to the solution of the Fokker-Planck equation for the time-dependent fission-decay width. This approximation is shown to be more realistic than previously proposed descriptions, which were widely used in the past.
arXiv comment31 pages, 11 figures, major changes, background information at http://www-wnt.gsi.de/kschmidt/
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- Fusion-fission reactions with modified Woods-Saxon potential
- Light Nuclides Produced in the Proton-Induced Spallation of 238U at 1 GeV
- Fragmentation of spherical radioactive heavy nuclei as a novel probe of transient effects in fission
- Transient and quasi-stationary dissipative effects in the fission flux across the barrier in 1 A GeV 238U on deuterium reactions
- Systematic comparison of ISOLDE-SC yields with calculated in-target production rates
- Manifestation of transient effects in fission induced by relativistic heavy-ion collisions
- Influence of fusion dynamics on fission observables: A multi-dimensional analysis
- Fission of relativistic nuclei with fragment excitation and reorientation