Temperature-dependent mean field and its effect on heavy-ion reactions

Puri, Rajeev K.; Ohtsuka, N.; Lehmann, E.; Faessler, Amand; Matin, M. A.; Khoa, Dao T.; Batko, G.; Huang, S.W.

doi:10.1016/0375-9474(94)90164-3

Cited by 90 publications

(101 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that the local anisotropic momentum space can well be parametrised by two inter-penetrating nuclear matter currents, i.e. by two Fermi-spheres in momentum space [32,33], or the Colliding Nuclear Matter (CNM) [34] which is schematically illustrated in Fig.6. The application of the relativistic DB model to CNM configurations has, however, not been realized yet, but only nonrelativistic G-matrix calculations have been performed for CNM [37].…”

Section: The Cnm Approximationmentioning

confidence: 99%

“…The anisotropic phase space effects discussed above are incorporated in heavy ion collisions by applying the CNM or non-equilibrium DB mean fields in the framework of a Local Configuration Approximation (LCA) [14,15,33]. In this approach the phase space is parametrised locally by a CNM configuration where the invariant configuration parameters χ are directly determined from the phase space distribution f (x, k * ).…”

Section: The Transport Modelmentioning

confidence: 99%

“…In the local density approximation (LDA) the nuclear matter mean fields are directly used in the transport calculation. However, this approximation is not reliable enough at intermediate energies, because the local momentum space is highly anisotropic during a large part of the heavy ion collision [15,32,33]. A better approximation is the colliding nuclear matter (CNM) approach, where the phase space anisotropies are parametrised by two interpenetrating nuclear matter currents, i.e.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Testing Dirac-Brueckner models in collective flow of heavy-ion collisions

et al. 2001

View full text Add to dashboard Cite

We investigate differential in-plane and out-of-plane flow observables in heavy ion reactions at intermediate energies from 0.2 ÷ 2 AGeV within the framework of relativistic BUU transport calculations. The mean field is based on microscopic Dirac-Brueckner-Hartree-Fock (DBHF) calculations. We apply two different sets of DBHF predictions, those of ter Haar and Malfliet and more recent ones from the Tübingen group, which are similar in general but differ in details. The latter DBHF calculations exclude spurious contributions from the negative energy sector to the mean field which results in a slightly softer equation of state and a less repulsive momentum dependence of the nucleon-nucleus potential at high densities and high momenta. For the application to heavy ion collisions in both cases non-equilibrium features of the phase space are taken into account on the level of the effective interaction. The systematic comparison to experimental data favours the less repulsive and softer model. Relative to non-relativistic approaches one obtains larger values of the effective nucleon mass. This produces a sufficient amount of repulsion to describe the differential flow data reasonably well.

show abstract

Section: The Cnm Approximationmentioning

confidence: 99%

Section: The Transport Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Testing Dirac-Brueckner models in collective flow of heavy-ion collisions

et al. 2001

View full text Add to dashboard Cite

show abstract

“…System size dependencies have been reported for various phenomena like fusionfission, particle production, multifragmentation, collective flow (of nucleons/fragments) as well as its disappearance, for density and temperature and so on [1][2][3][4][5][6]. Low energy fusion processes deserve a special mention, where the mass dependence was analysed using hundred of reactions.…”

Section: Introductionmentioning

confidence: 99%

“…(2) To study the mass dependence of the EVF for various colliding pairs having neutron to proton ratio varying from that of pure symmetric matter to highly neutron-rich ones. The present study will be carried out within the framework of the isospin-dependent quantum molecular dynamics (IQMD) model, the details of which can be found in Ref.…”

Section: Introductionmentioning

confidence: 99%

Neutron to proton ratio dependence of energy of vanishing flow: role of system size and collision geometry

Gautam¹

2014

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract.We study the effects of system size on the neutron to proton ratio dependence of the energy of vanishing flow for isotopic series of various colliding nuclei. We find a significant effect of the nuclear symmetry energy on the neutron to proton ratio dependence of the energy of vanishing flow throughout the mass range for central as well as peripheral collisions. We find that the neutron to proton ratio dependence of the energy of vanishing flow for isotopic series of heavier system shows more sensitivity to the symmetry energy compared to that for lighter systems and that this sensitivity is enhanced in peripheral collisions. In addition, the mass dependence of the energy of vanishing flow has also been studied for systems having a neutron to proton ratio varying from purely symmetric matter to a highly neutron-rich one.

show abstract

Simulated Annealing Clusterization Algorithm for Studying the Multifragmentation

Puri

Aichelin

2000

Journal of Computational Physics

Self Cite

143

View full text Add to dashboard Cite

We here present the details of the numerical realization of the recently advanced algorithm developed to identify the fragmentation in heavy ion reactions. This new algorithm is based on the simulated annealing method and is dubbed the simulated annealing clusterization algorithm (SACA). We discuss the different parameters used in the simulated annealing method and present an economical set of the parameters which is based on the extensive analysis carried out for the central and peripheral collisions of Au-Au, Nb-Nb, and Pb-Pb. These parameters are crucial for the success of the algorithm. Our set of optimized parameters gives the same results as the most conservative choice, but is very fast. We also discuss the nucleon and fragment exchange processes which are very important for the energy minimization and finally present the analysis of the reaction dynamics using the new algorithm. This algorithm can be applied whenever one wants to identify which of a given number of constituents form bound objects.

show abstract

Temperature-dependent mean field and its effect on heavy-ion reactions

Cited by 90 publications

References 43 publications

Testing Dirac-Brueckner models in collective flow of heavy-ion collisions

Testing Dirac-Brueckner models in collective flow of heavy-ion collisions

Neutron to proton ratio dependence of energy of vanishing flow: role of system size and collision geometry

Simulated Annealing Clusterization Algorithm for Studying the Multifragmentation

Contact Info

Product

Resources

About