The unrestricted Skyrme-tensor time-dependent Hartree-Fock and its application to the nuclear response from spherical to triaxial nuclei

TL;DR

This paper introduces a fully self-consistent three-dimensional time-dependent Hartree-Fock model based on the Skyrme energy density functional with tensor forces, applied to study nuclear responses across various nuclear shapes, including spherical and triaxial nuclei.

Contribution

It presents the first implementation of a 3D TDHF model with the full Skyrme functional and tensor forces, analyzing their impact on nuclear response and deformation properties.

Findings

Spin-dependent terms significantly alter strength distribution.

Quantitative effects on linear response are minimal.

Good agreement with experimental data and RPA predictions.

Abstract

The nuclear time-dependent Hartree-Fock model formulated in the three-dimensional space,based on the full Skyrme energy density functional and complemented with the tensor force,is presented for the first time. Full self-consistency is achieved by the model. The application to the isovector giant dipole resonance is discussed in the linear limit, ranging from spherical nuclei (16O, 120Sn) to systems displaying axial or triaxial deformation (24Mg, 28Si, 178Os, 190W, 238U). Particular attention is paid to the spin-dependent terms from the central sector of the functional, recently included together with the tensor. They turn out to be capable of producing a qualitative change on the strength distribution in this channel. The effect on the deformation properties is also discussed. The quantitative effects on the linear response are small and, overall, the giant dipole energy remains unaffected. Calculations are compared to predictions from the (quasi)-particle random phase approximation and experimental data where available, finding good agreement.