Description of the asymmetric to symmetric fission transition in the neutron-deficient Thoriums -- Role of the tensor force

Abstract

In the present study, we have investigated the impact of the tensor force on fission paths, in particular the symmetric and asymmetric barriers in 230 Th, 226 Th, 222 Th and 216 Th isotopes which display an asymmetric to symmetric fission transition. This analysis has been performed within the HFB approach with (Q 20 ,Q 30 ,Q 40 ) as collective variable constraints, using the D1ST2a Gogny+tensor term interaction and comparing to the standard D1S Gogny interaction results. The effects from the tensor term on the potential energy surface landscape, and especially on barrier heights and its topology by opening a new valley in agreement with experimental data, are found to be crucial in the description of exotic actinide fission. We conclude that a tensor term should be integrated to the long range part of the effective interaction for a better description of the fission.

arXiv comment24 pages, accepted in Phys. Rev. C

References in corpus (33)

• Structure of even-even nuclei using a mapped collective Hamiltonian and the D1S Gogny interaction
• The tensor part of the Skyrme energy density functional. I. Spherical nuclei
• Microscopic Theory of Nuclear Fission: A Review
• Microscopic approach of fission dynamics applied to fragment kinetic energy and mass distributions in 238U
• Induced Fission of ${}^{240}$Pu within a Real-Time Microscopic Framework
• Mean field and beyond description of nuclear structure with the Gogny force: A review
• Configuration mixing of angular-momentum projected triaxial relativistic mean-field wave functions
• Configuration mixing of angular-momentum and particle-number projected triaxial HFB states using the Skyrme energy density functional
• Fission fragment charge and mass distributions in 239Pu(n,f) in the adiabatic nuclear energy density functional theory
• Tensor part of the Skyrme energy density functional. II: Deformation properties of magic and semi-magic nuclei
• Time-dependent Hartree-Fock calculations for multinucleon transfer and quasifission processes in the ${}^{64}$Ni+${}^{238}$U reaction
• Structure properties of ${}^{226}$Th and ${}^{256,258,260}$Fm fission fragments: mean field analysis with the Gogny force
• Nuclear-fission studies with relativistic secondary beams: analysis of fission channels
• Microscopic phase-space exploration modeling of ${}^{258}$Fm spontaneous fission
• Microscopic calculation of 240Pu scission with a finite-range effective force
• Dynamic versus static fission paths with realistic interactions
• Low-Energy Heavy-Ion Reactions and the Skyrme Effective Interaction
• Application of the gradient method to Hartree-Fock-Bogoliubov theory
• Microscopic and non-adiabatic Schrödinger equation derived from the Generator Coordinate Method based on 0 and 2 quasiparticle HFB states
• Nuclear Scission and Quantum Localization
• From Asymmetric to Symmetric Fission in the Fermium Isotopes within the Time-Dependent GCM Formalism
• The Role of Tensor Force in Heavy-Ion Fusion Dynamics
• Tensor and tensor-isospin terms in the effective Gogny interaction
• Tensor effective interaction in self-consistent Random Phase Approximation calculations
• Tensor parameters in Skyrme and Gogny effective interactions: Trends from a ground-state-focused study
• Fission dynamics of ${}^{252}$Cf
• FELIX-2.0: New version of the finite element solver for the time dependent generator coordinate method with the Gaussian overlap approximation
• Pairing gaps in Hartree-Fock Bogoliubov theory with the Gogny D1S interaction
• The influence of tensor force on the microscopic heavy-ion interaction potential
• Role of dynamic pairing correlations in fission dynamics
• Non-perturbative collective inertias for fission: a comparative study
• Influence of the tensor interaction on heavy-ion fusion cross sections
• Scission Dynamics with K Partitions

Cited by in corpus (7)

• Future of Nuclear Fission Theory
• Comparison of fission and quasi-fission modes
• Hartree-Fock-Bogoliubov study of quantum shell effects on the path to fission in ${}^{180}$Hg, ${}^{236}$U and ${}^{256}$Fm
• Shell effects in quasi-fission for calcium induced reactions forming thorium isotopes
• Role of tensor terms of the Skyrme energy-density functional on neutron deformed magic numbers in the rare-earth region
• Microscopic description of spontaneous fission based on a Gogny energy density functional including tensor contributions
• Impact of finite-range spin-orbit and tensor terms in Gogny EDF