Spontaneous fission lifetimes from the minimization of self-consistent collective action

Sadhukhan, Jhilam; Mazurek, K.; Baran, A.; Dobaczewski, J.; Nazarewicz, W.; Sheikh, J. A.

doi:10.1103/physrevc.88.064314

Title: Spontaneous fission lifetimes from the minimization of self-consistent collective action

Journal Article · Sun Dec 01 00:00:00 EST 2013 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/physrevc.88.064314· OSTI ID:1565204

Sadhukhan, Jhilam; Mazurek, K.; Baran, A.; Dobaczewski, J.; Nazarewicz, W.; Sheikh, J. A.

The spontaneous fission lifetime of 264 Fm has been studied within nuclear density functional theory by minimizing the collective action integral for fission in a two-dimensional quadrupole collective space representing elongation and triaxiality. The collective potential and inertia tensor are obtained self-consistently using the Skyrme energy density functional and density-dependent pairing interaction. The resulting spontaneous fission lifetimes are compared with the static result obtained with the minimum-energy pathway. We show that fission pathways strongly depend on assumptions underlying collective inertia. With the nonperturbative mass parameters, the dynamic fission pathway becomes strongly triaxial and it approaches the static fission valley. On the other hand, when the standard perturbative cranking inertia tensor is used, axial symmetry is restored along the path to fission; an effect that is an artifact of the approximation used.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of Tennessee, Knoxville, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-96ER40963; FG52-09NA29461; SC0008499

OSTI ID:: 1565204

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 88, Issue 6; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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