6533b825fe1ef96bd1281fc1
RESEARCH PRODUCT
Spontaneous fission lifetimes from the minimization of self-consistent collective action
Jhilam SadhukhanJhilam SadhukhanJacek DobaczewskiJ. A. SheikhJ. A. SheikhK. MazurekK. MazurekAndrzej BaranAndrzej BaranAndrzej BaranWitold NazarewiczWitold NazarewiczWitold Nazarewiczsubject
PhysicsNuclear and High Energy Physicsta114Nuclear TheoryFissionmedia_common.quotation_subjectNuclear TheoryFOS: Physical sciencesMoment of inertiaInertiaNuclear physicsNuclear Theory (nucl-th)Quantum electrodynamicsPairingQuadrupoleAxial symmetryNuclear ExperimentNuclear densitySpontaneous fissionmedia_commondescription
The spontaneous fission lifetime of 264Fm 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 non-perturbative 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-10-08 |