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Super-short fission mode in fermium isotopes

Albertsson, M. LU ; Carlsson, B. G. LU ; Døssing, T. LU ; Möller, P. LU ; Randrup, J. LU and Åberg, S. LU (2021) In Physical Review C 104(6).
Abstract

The so-called super-short fission mode, in which a nucleus divides nearly symmetrically into two unusually energetic fragments, competes favorably with the standard asymmetric fission mode for spontaneous fission of a limited number of nuclei near Fm264 but it quickly fades away at finite excitations. We investigate the energy-dependent competition between those two fission modes for even fermium isotopes from Fm254 to Fm268, using the Metropolis method to simulate the strongly damped fission dynamics being driven by shape- and energy-dependent level densities. The origin of the super-short mode is discussed and its effects on the fragment mass distribution, the total fragment kinetic energy, and the neutron multiplicity are calculated.... (More)

The so-called super-short fission mode, in which a nucleus divides nearly symmetrically into two unusually energetic fragments, competes favorably with the standard asymmetric fission mode for spontaneous fission of a limited number of nuclei near Fm264 but it quickly fades away at finite excitations. We investigate the energy-dependent competition between those two fission modes for even fermium isotopes from Fm254 to Fm268, using the Metropolis method to simulate the strongly damped fission dynamics being driven by shape- and energy-dependent level densities. The origin of the super-short mode is discussed and its effects on the fragment mass distribution, the total fragment kinetic energy, and the neutron multiplicity are calculated. Generally good agreement with the available data is obtained.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
104
issue
6
article number
064616
publisher
American Physical Society
external identifiers
  • scopus:85122493341
ISSN
2469-9985
DOI
10.1103/PhysRevC.104.064616
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by "https://www.kb.se/samverkan-och-utveckling/oppen-tillgang-och-bibsamkonsortiet/bibsamkonsortiet.html"Bibsam.
id
6b7f1c21-4d46-4abd-81b1-18f752a1c19e
date added to LUP
2022-02-06 12:47:42
date last changed
2024-04-27 22:05:16
@article{6b7f1c21-4d46-4abd-81b1-18f752a1c19e,
  abstract     = {{<p>The so-called super-short fission mode, in which a nucleus divides nearly symmetrically into two unusually energetic fragments, competes favorably with the standard asymmetric fission mode for spontaneous fission of a limited number of nuclei near Fm264 but it quickly fades away at finite excitations. We investigate the energy-dependent competition between those two fission modes for even fermium isotopes from Fm254 to Fm268, using the Metropolis method to simulate the strongly damped fission dynamics being driven by shape- and energy-dependent level densities. The origin of the super-short mode is discussed and its effects on the fragment mass distribution, the total fragment kinetic energy, and the neutron multiplicity are calculated. Generally good agreement with the available data is obtained. </p>}},
  author       = {{Albertsson, M. and Carlsson, B. G. and Døssing, T. and Möller, P. and Randrup, J. and Åberg, S.}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Super-short fission mode in fermium isotopes}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.104.064616}},
  doi          = {{10.1103/PhysRevC.104.064616}},
  volume       = {{104}},
  year         = {{2021}},
}