Multidimensional Skyrme-density-functional Study of the Spontaneous Fission of 238U
Sadhukhan, J., Mazurek, K., Dobaczewski, J., Nazarewicz, W., Sheikh, J. A., & Baran, A. (2015). Multidimensional Skyrme-density-functional Study of the Spontaneous Fission of 238U. Acta Physica Polonica B, 46 (3), 575-578. doi:10.5506/APhysPolB.46.575
Published inActa Physica Polonica B
© the Authors, 2015. This is an open access article distributed under a Creative Commons Attribution 3.0 License. Funded by SCOAP3.
We determined the spontaneous fission lifetime of 238U by a minimization of the action integral in a three-dimensional space of collective variables. Apart from the mass-distribution multipole moments Q20 (elongation) and Q30 (left–right asymmetry), we also considered the pairing- fluctuation parameter λ2 as a collective coordinate. The collective potential was obtained self-consistently using the Skyrme energy density functional SkM∗ . The inertia tensor was obtained within the nonperturbative cranking approximation to the adiabatic time-dependent Hartree–Fock– Bogoliubov approach. The pairing-fluctuation parameter λ2 allowed us to control the pairing gap along the fission path, which significantly changed the spontaneous fission lifetime.