Bimodal fission in the Skyrme-Hartree-Fock approach

A. STASZCZAK, J. DOBACZEWSKI, W. NAZAREWICZ

Abstract:

Spontaneous-fission properties of $^{256}$Fm, $^{258}$Fm, and $^{260}$Fm isotopes are studied within the Skyrme-Hartree-Fock+BCS framework. In the particle-hole channel we take the Skyrme SkM$^*$ effective force, while in the particle-particle channel we employ the seniority pairing interaction. Three static fission paths for all investigated heavy fermium isotopes are found. The analysis of these fission modes allows to describe observed asymmetric fission of $^{256}$Fm, as well as bimodal fission of $^{258}$Fm and symmetric fission in $^{260}$Fm.