17–21 Aug 2020
Asia/Tokyo timezone

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.

[1] G. Colo, H. Sagawa, S. Fracasso, P.F. Bortignon, Phys. Lett. B 646, 227 (2007)
[2] D. M. Brink and F.Stancu, Phys. Rev. C 75, 064311 (2007); Phys.Rev. C 97, 064304 (2018)
[3] T. Lesinski, M. Bender, K. Bennaceur, T. Duguet, J. Meyer, Phys.Rev. C 76, 014312 (2007)
[4] M. Zalewski, J. Dobaczewski, W. Satua, and T. R. Werner, Phys. Rev. C 77, 024316 (2008)
[5] M. Kortelainen, J. Dobaczewski, K. Mizuyama, and J. Toivanen, Phys. Rev. C 77, 064307 (2008)
[6] M. Grasso and M. Anguiano, Phys. Rev. C 88, 054328 (2013)
[7] Marta Anguiano, Marcella Grasso, G. Co, V. De Donno, and A. M. Lallena, Phys. Rev. C 86, 054302 (2012)
[8] S. V. Tolokonnikov, I. N. Borzov, Yu. Si. Lyutostansky and E. E. Saperstein, JETP Lett. 107, 86 (2018)
[9] R. N. Bernard, N. Pillet, L. M. Robledo, and M. Anguiano, Phys. Rev. C 101, 044615 (2020)

Field of your work Theoretical nuclear physics

Primary author

Meng-Hock Koh (Universiti Teknologi Malaysia)

Co-authors

Dr Ludovic Bonneau (Center of Nuclear Studies Bordeaux Gradignan) Dr Paul Stevenson (University of Surrey) Dr Tran Viet Nhan Hao (University of Hue)

Presentation materials

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