Physics – Nuclear Physics
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..561..455m&link_type=abstract
TOURS SYMPOSIUM ON NUCLEAR PHYSICS IV: TOURS 2000. AIP Conference Proceedings, Volume 561, pp. 455-468 (2001).
Physics
Nuclear Physics
1
Spontaneous Fission, 220<=A, Nuclear Reaction Models And Methods, Shell Model, Mass And Neutron Distributions
Scientific paper
We calculate complete fission potential-energy surfaces versus five shape coordinates: elongation, neck diameter, light-fragment deformation, heavy-fragment deformation, and mass asymmetry for even nuclei in the range 82<=Z<=100. The potential energy is calculated in terms of the macroscopic-microscopic model with a folded-Yukawa single-particle potential and a Yukawa-plus-exponential macroscopic model in the three-quadratic-surface parameterization. The structure of the calculated energy landscapes exhibits multiple valleys leading to different scission configurations. The properties of these valleys and the saddle-points at the beginning of these valleys can be directly related to bimodal fission properties observed in the radium region, in the light-actinide region, and in the fermium region). The rms deviation between calculated and experimental fission-barrier heights is only 1.08 MeV for 31 nuclei from 70Se to 252Cf. .
Iwamoto Akira
Madland David G.
Moller Peter
Sierk Arnold J.
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