Fission modes of 256Fm and 258Fm in a microscopic approach

Details Fission modes of 256Fm and 258Fm in a microscopic approach Fission modes of 256Fm and 258Fm in a microscopic approach

2006-04-04

arxiv.org/abs/nucl-th/0604011v1

Phys.Rev. C74 (2006) 014301

Physics

Nuclear Physics

Nuclear Theory

14 pages, 11 figures, 3 tables, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.74.014301

A static microscopic study of potential-energy surfaces within the Skyrme-Hartree-Fock-plus-BCS model is carried out for the 256Fm and 258Fm isotopes with the goal of deducing some properties of spontaneous fission. The calculated fission modes are found to be in agreement with the experimentaly observed asymmetric-to-symmetric transition in the fragment-mass distributions and with the high- and low-total-kinetic-energy modes experimentally observed in 258Fm. Most of the results are similar to those obtained in macroscopic-microscopic models as well as in recent Hartree-Fock-Bogolyubov calculations with the Gogny interaction, with a few differences in their interpretations. In particular an alternative explanation is proposed for the low-energy fission mode of 258Fm.

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