Fission of super-heavy nuclei explored with Skyrme forces

Details Fission of super-heavy nuclei explored with Skyrme forces Fission of super-heavy nuclei explored with Skyrme forces

2010-01-29

arxiv.org/abs/1002.0031v1

Physics

Nuclear Physics

Nuclear Theory

9 pages, 6 figures

Scientific paper

We present a large scale survey of life-times for spontaneous fission in the regime of super-heavy elements (SHE), i.e. nuclei with Z=104-122. This is done on the basis of the Skyrme-Hartree-Fock model. The axially symmetric fission path is computed using a quadrupole constraint. Self-consistent cranking is used for the collective masses and associated quantum corrections. The actual tunneling probability is estimated by the WKB approximation. Three typical Skyrme forces are used to explore the sensitivity of the results. Benchmarks in the regime Z=104-108 show an acceptable agreement. The general systematics reflects nicely the islands of shell stabilization and the crossover from $\alpha$-decay to fission for the decay chains from the region of Z/N=118/176.

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