Dissipation strength of the tilting degree of freedom in fusion-fission reactions
Omsk State University, Physics Department, Mira prospekt 55-A, Omsk, 644077, Russia
Published online: 11 May 2016
The four-dimensional Langevin model was applied to calculate a wide set of experimental observables for compound nuclei, formed in heavy-ion fusion-fission reactions. A modified one-body mechanism for nuclear dissipation with a reduction coefficient ks of the contribution from a “wall” formula was used for shapes parameters. Different possibilities of deformation-dependent dissipation coefficient for the K coordinate (γK) were investigated. Presented results demonstrate that the influence of the ks and γK parameters on the calculated quantities can be selectively probed. It was found that it is possible to describe experimental data with the deformation-dependent γK coefficient. One of the possibility is to use large values of γK ≃ 0.2 (MeV zs)−1/2 for compact shapes featuring no neck and small values of γK ≃ 0.0077 (MeV zs)−1/2 for elongated shapes.
© Owned by the authors, published by EDP Sciences - SIF, 2016
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