Super-short fission mode in fermium isotopes
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Super-short fission mode in fermium isotopes. / Albertsson, M.; Carlsson, B. G.; Dossing, T.; Moller, P.; Randrup, J.; Aberg, S.
I: Physical Review C, Bind 104, Nr. 6, 064616, 27.12.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Super-short fission mode in fermium isotopes
AU - Albertsson, M.
AU - Carlsson, B. G.
AU - Dossing, T.
AU - Moller, P.
AU - Randrup, J.
AU - Aberg, S.
PY - 2021/12/27
Y1 - 2021/12/27
N2 - 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 264Fm but it quickly fades away at finite excitations. We investigate the energy-dependent competition between those two fission modes for even fermium isotopes from 254Fm to 268Fm, 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.
AB - 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 264Fm but it quickly fades away at finite excitations. We investigate the energy-dependent competition between those two fission modes for even fermium isotopes from 254Fm to 268Fm, 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.
KW - NEUTRON-INDUCED FISSION
KW - SYMMETRIC FISSION
KW - KINETIC-ENERGY
KW - MASS
KW - HEAVY
KW - DISTRIBUTIONS
KW - MULTIPLICITY
KW - SYSTEMATICS
KW - MD-258
U2 - 10.1103/PhysRevC.104.064616
DO - 10.1103/PhysRevC.104.064616
M3 - Journal article
VL - 104
JO - Physical Review C
JF - Physical Review C
SN - 2469-9985
IS - 6
M1 - 064616
ER -
ID: 289233281