Enhanced spin-current tensor contribution in collision dynamics

Iwata, Yoritaka; Maruhn, J. A.

doi:10.1103/physrevc.84.014616

Cited by 27 publications

(40 citation statements)

References 24 publications

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“…As indicated by Loebl and collaborators, the one-body dissipation is not enough to achieve the true equilibrium as the reaction proceeds to longer contact times [15]. The tensor force has been included in recent TDHF calculations [17][18][19]. The timeeven contribution of the tensor force was found to have important roles in heavy-ion collisions [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Dissipation dynamics and spin-orbit force in time-dependent Hartree-Fock theory

et al. 2014

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We investigate the one-body dissipation dynamics in heavy-ion collisions of 16 O+ 16 O using a fully three-dimensional time-dependent Hartree-Fock (TDHF) theory with the modern Skyrme energy functional and without any symmetry restrictions. The energy dissipation is revealed to decrease in deep-inelastic collisions of the light systems as the bombarding energy increases owing to the competition between collective motion and single-particle degrees of freedom. The role of spin-orbit force is given particular emphasis in deep-inelastic collisions. The spin-orbit force causes a significant enhancement of the dissipation. The time-even coupling of spin-orbit force plays a dominant role at low energies, while the influence of time-odd terms is notable at high energies. About 40-65% of the total dissipation depending on the different parameter sets is predicted to arise from the spin-orbit force. The theoretical fusion cross section has a reasonably good agreement with the experimental data, considering that no free parameters are adjusted to reaction dynamics in the TDHF approach.

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Section: Introductionmentioning

confidence: 99%

“…The tensor force has been included in recent TDHF calculations [17][18][19]. The timeeven contribution of the tensor force was found to have important roles in heavy-ion collisions [17,18]. The full tensor expression was introduced to study the resonance dynamics [19].…”

Section: Introductionmentioning

confidence: 99%

Dissipation dynamics and spin-orbit force in time-dependent Hartree-Fock theory

et al. 2014

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“…They can range from nuclear structure features like giant resonances (including nonlinearities and decay by particle emission) and large amplitude dynamics like collisions of nuclei (including fusion and fission processes). In this paper we focus on the first application, while another one about nucleus-nucleus collisions [2] will follow as an extension of recent related work [3]- [4].…”

Section: Introductionmentioning

confidence: 99%

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

2012

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The nuclear time-dependent Hartree-Fock model formulated in the three-dimensional space, based on the full standard Skyrme energy density functional 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 ( 16 O, 120 Sn) to systems displaying axial or triaxial deformation ( 24 Mg, 28 Si, 178 Os, 190 W , 238 U). 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.

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“…The fusion window, which was calculated in simplified time-dependent mean-field calculations, is a passing through of colliding nuclei even in collisions at sufficient low energies. For a recent work treating the dynamical dissipation due to the spin-orbit and tensor forces, see [3]. Note that, as is shown in the following, the introduction of the spin-orbit force to the time-dependent mean-field calculations only in two-dimensional axial symmetric framework is not sufficient.…”

Section: Introductionmentioning

confidence: 98%

“…Indeed the axial symmetry breaking of spin distribution is shown even in central collisions (see Fig. 2 of [3] for a calculation using SkM*, and see Fig. 1 of [13] for a calculation using SLy4d).…”

Section: Spin-orbit Force Contribution In Heavy-ion Reactionsmentioning

confidence: 99%