A3F-CNS Summer School 2020

Perturbatve refit of Skyrme parametrization with nuclear tensor for fission calculations

Not scheduled

15m

Speaker

Meng-Hock Koh (Universiti Teknologi Malaysia)

Description

Interest on the impact of nuclear tensor force on nuclear properties has been on the rise in the past decade. Within the Skryme mean-field framework, some new parametrizations have been proposed. Among them are the SLy5+tensor (SLy5+T) [1] and SIII+tensor (SIII+T) [2] in which tensor term was added perturbatively. In another work of Ref. [3], a family of TIJ Skyrme parametrization was introduced whereby all coupling constants entering the energy-density-functional (EDF) were refitted. The impact of nuclear tensor on nuclear properties have also been extensively explored in other studies for e.g. [4, 5] using Skyrme interaction and [6, 7] using the Gogny interaction. On the other hand, the impact of nuclear tensor in fission process is rather limited. To the best of our knowledge, there are two studies by [8] and [9] within the Fayans and Gogny EDF, respectively. We, on the other hand, chose to investigate the impact of nuclear tensor on fission barriers within a Skyrme-Hartree-Fock-plus-BCS framework. Some parametrizations were proposed in which the nuclear tensor component was perturbatively added on top of the SkM* parametrization usually used for fission calculations. A refit of the spin-orbit coefficient was also considered. In this talk, I will share current findings on the performance of these parametrizations on ground-state properties of some plutonium isotopes and fission barriers of $^{240}$Pu.

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