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

Kolomietz, VM ; Radionov, Sergey LU and Shlomo, S (2006) In Physica Scripta 73(5). p.458-465
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... (More)
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. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physica Scripta
volume
73
issue
5
pages
458 - 465
publisher
IOP Publishing
external identifiers
  • wos:000237074800008
  • scopus:33745494532
ISSN
0031-8949
DOI
10.1088/0031-8949/73/5/008
language
English
LU publication?
yes
additional info
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)
id
f8d365bf-25a3-4a10-a1a8-8c8d55dbe9b6 (old id 410675)
date added to LUP
2016-04-01 12:01:59
date last changed
2021-01-06 01:11:41
@article{f8d365bf-25a3-4a10-a1a8-8c8d55dbe9b6,
  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, &lt; E-kin,E-ps &gt;, and the variance, sigma(E-kin,(ps)), of the pre-scission kinetic energy. We show that the memory effect hinders the values of &lt; E-kin,E-ps &gt; 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.},
  author       = {Kolomietz, VM and Radionov, Sergey and Shlomo, S},
  issn         = {0031-8949},
  language     = {eng},
  number       = {5},
  pages        = {458--465},
  publisher    = {IOP Publishing},
  series       = {Physica Scripta},
  title        = {The influence of memory effects on dispersions of kinetic energy at nuclear fission},
  url          = {http://dx.doi.org/10.1088/0031-8949/73/5/008},
  doi          = {10.1088/0031-8949/73/5/008},
  volume       = {73},
  year         = {2006},
}