The influence of memory effects on dispersions of kinetic energy at nuclear fission

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Abstract

Within the nuclear Fermi-liquid approach, the memory effect on the Landau-Vlasov-Langevin dynamics is considered. The basic collisional kinetic equation for the Wigner distribution function is reduced to a macroscopic equation of motion for the shape variables of the nucleus. Parametrizing the potential energy of the nucleus at descent from the fission barrier by the inverted oscillator potential, we derive analytical expressions for the mean value, < E-kin,E-ps >, and the variance, sigma(E-kin,(ps)), of the pre-scission kinetic energy. We show that the memory effect hinders the values of < E-kin,E-ps > and sigma(E-kin,E-ps) due to an additional elastic force originating from the memory integral. The hindrance effect increases with the increase of the relaxation time.

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  • Physical Sciences
Original languageEnglish
Pages (from-to)458-465
JournalPhysica Scripta
Volume73
Issue number5
Publication statusPublished - 2006
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)