Spin-orbit force contribution to dissipative dynamics

Iwata, Yoritaka

doi:10.1051/epjconf/20122107001

Cited by 3 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [117], Iwata examines dissipation mechanisms by extracting a collective potential energy and following it as a function of time in collisions of 16 O and 16 O at 40 MeV centre-of-mass energy. SLy4d [30] and SkM* [38] Skyrme interactions are used.…”

Section: Spin-orbit Interactionsmentioning

confidence: 99%

Low-energy heavy-ion reactions and the Skyrme effective interaction

Stevenson

Barton

2019

Progress in Particle and Nuclear Physics

View full text Add to dashboard Cite

The Skyrme effective interaction, with its multitude of parameterisations, along with its implementation using the static and time-dependent density functional (TDHF) formalism have allowed for a range of microscopic calculations of low-energy heavy-ion collisions. These calculations allow variation of the effective interaction along with an interpretation of the results of this variation informed by a comparison to experimental data. Initial progress in implementing TDHF for heavy-ion collisions necessarily used many approximations in the geometry or the interaction. Over the last decade or so, the implementations have overcome all restrictions, and studies have begun to be made where details of the effective interaction are being probed. This review surveys these studies in low energy heavy-ion reactions, finding significant effects on observables from the form of the spin-orbit interaction, the use of the tensor force, and the inclusion of time-odd terms in the density functional.Heavy-ion collisions combine the rich dynamics of a many-body out-of-equilibrium open quantum system with the complexities of the residual part of the strong interaction which leaks out of the small, but neither fundamental or point-like, nucleons, causing them to stick loosely together some of the time, and to fall apart at others. Understanding heavy-ion reactions across all energy scales is necessary to understand stellar nucleosynthesis [1], the synthesis of superheavy nuclei [2,3], the properties of nuclear matter [4][5][6], the QCD phase diagram [7,8] as well as the understanding of reaction mechanisms themselves [9][10][11][12][13].Among the theoretical techniques used to study heavy-ion reactions, methods based on timedependent Hartree-Fock have recently achieved the status of having sufficiently mature implementations free of limiting approximations, and running at a suitable speed, such that systematically varying the effective interaction in the calculations is possible. It is such studies that form the main subject of the present review. The practical implementations, using the Skyrme interaction, are in some sense parameter-free, in that one has a framework using an effective interaction fitted to ground state data and nuclear matter properties, with no further adjustment to dynamics. Structure and reaction effects are together determined self-consistently from the interaction, subject to the approximations of the mean-field and one gives no further adjustment. In another sense, the variation among the sets of available effective interactions are parameters of the calculations. We attempt to summarise here what has been learnt from exploring different Skyrme force parameterisations within low-energy heavy-ion reaction calculations.Overlapping this subject area are other recent review articles, to which the reader is referred: A review in which extensive coverage of theoretical approaches to dynamics of heavy-ion collisions in TDHF and its extensions is presented by Simenel and Umar [14]. This review extensively covers the...

show abstract

Section: Spin-orbit Interactionsmentioning

confidence: 99%

Low-energy heavy-ion reactions and the Skyrme effective interaction

Stevenson

Barton

2019

Progress in Particle and Nuclear Physics

View full text Add to dashboard Cite

show abstract

“…( 6). In this way the quantum one-body dissipation, which has been suggested to be associated with the spinoribit component of the nuclear force [37] based on the TDDFT calculations, is made into the energy-dependent friction coefficient. As a result the energy-dependent friction coefficient is calculated for each excited nucleus 2A 2Z.…”

Section: Outlinementioning

confidence: 99%

Inertial energy dissipation in nuclear dynamics

Iwata,

Nishikawa

2021

Preprint

Self Cite

View full text Add to dashboard Cite

We present the TDDFT+Langevin model that incorporates microscopic time-dependent density function theory (TDDFT) with macroscopic Langevin model. By extracting the energy-dependent dissipation effect from the TDDFT dynamics, quantum effects are introduced to the Langevin-type stochastic fission analysis. In this paper, by means of Skyrme nuclear effective interactions, the energy-dependent friction coefficients to be used in Langevin calculations are provided individually for 25 fission nuclei chosen from uranium, plutonium, curium, californium, and fermium isotopes. The validity of the energy-dependent friction coefficients are confirmed by comparing to the existing experimental fission fragment yields. In conclusion, depending on the energy, the transition of energy dissipation mechanism from conventional viscous energy dissipation to inertial energy dissipation is shown.

show abstract

Inertial energy dissipation in nuclear dynamics

Iwata

Nishikawa²

2022

Phys. Rev. C

View full text Add to dashboard Cite

Spin-orbit force contribution to dissipative dynamics

Cited by 3 publications

References 11 publications

Low-energy heavy-ion reactions and the Skyrme effective interaction

Low-energy heavy-ion reactions and the Skyrme effective interaction

Inertial energy dissipation in nuclear dynamics

Inertial energy dissipation in nuclear dynamics

Contact Info

Product

Resources

About