Temperature of intermediate mass fragments in simulated 40Ca + 40Ca reactions around the Fermi energies by AMD model

Ma, Can; Qiao, Chun-Yuan; Ding, Tian-Tian; Song, Yushou

doi:10.1007/s41365-016-0112-8

Cited by 19 publications

(7 citation statements)

References 30 publications

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“…In the first stage of abrasion, they calculate the abrasion cross section with probability P Ns,Zs (b) (N s , Z s denote the neutrons and protons in the projectile-like fragment) at an impact parameter b. An improvement has been achieved by incorporating an impact-parameter-dependent temperature profile in the abrasion simulation [166] (the non-uniform temperature for primary fragments and cold fragments have also been shown [140,144,145,167,168,169,170]). In the second stage, the fragment in the first stage undergoes expanding and breaking up process, which turns into many excited composites and nucleons.…”

Section: Abrasion Plus Canonical Thermodynamic Modelmentioning

confidence: 99%

“…Mallik et al [165,166,167] proposed a model to calculated the cross sections of various reaction products in disintegration of projectile-like fragments, which includes three parts: (1) abrasion, (2) disintegration of hot abraded projectile-like fragment, and (3) possible evaporation of hot primary fragments. The model is organized based on the physics between the phenomenological empirical parametrization of fragmentation cross sections (EPAX) and HIPSE model and AMD model.…”

Section: Abrasion Plus Canonical Thermodynamic Modelmentioning

confidence: 99%

“…In Figure 18, the results of ∆In (I+2m,I,A) /m for the fragments produced in the 140 MeV/u 64 Ni/ 58 Ni + 9 Be reactions simulated by the AMD (+ gemini) model are plotted. To simulated the reactions, the extended version of the AMD model (AMD-V) [110] has been used for the reason that it yields good results for intermediate mass fragments [115,116,197,281,284,285,286]. The soft interaction, i.e., the standard Gogny-g0 interaction [287] was used to govern all the reactions.…”

Section: Snmentioning

confidence: 99%

“…To simulated the reactions, the extended version of the AMD model (AMD-V) [110] has been used for the reason that it yields good results for intermediate mass fragments [115,116,197,281,284,285,286]. The soft interaction, i.e., the standard Gogny-g0 interaction [287] was used to govern all the reactions.…”

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confidence: 99%

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Shannon information entropy in heavy-ion collisions

2018

Progress in Particle and Nuclear Physics

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102

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The general idea of information entropy provided by C.E. Shannon "hangs over everything we do" and can be applied to a great variety of problems once the connection between a distribution and the quantities of interest is found. The Shannon information entropy essentially quantify the information of a quantity with its specific distribution, for which the information entropy based methods have been deeply developed in many scientific areas including physics. The dynamical properties of heavy-ion collisions (HICs) process make it difficult and complex to study the nuclear matter and its evolution, for which Shannon information entropy theory can provide new methods and observables to understand the physical phenomena both theoretically and experimentally. To better understand the processes of HICs, the main characteristics of typical models, including the quantum molecular dynamics models, thermodynamics models, and statistical models, etc, are briefly introduced. The typical applications of Shannon information theory in HICs are collected, which cover the chaotic behavior in branching process of hadron collisions, the liquid-gas phase transition in HICs, and the isobaric difference scaling phenomenon for intermediate mass fragments produced in HICs of neutron-rich systems. Even though the present applications in heavy-ion collision physics are still relatively simple, it would shed light on key questions we are seeking for. It is suggested to further develop the information entropy methods in nuclear reactions models, as well as to develop new analysis methods to study the properties of nuclear matters in HICs, especially the evolution of dynamics system.

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Section: Abrasion Plus Canonical Thermodynamic Modelmentioning

confidence: 99%

Section: Abrasion Plus Canonical Thermodynamic Modelmentioning

confidence: 99%

Section: Snmentioning

confidence: 99%

mentioning

confidence: 99%

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Shannon information entropy in heavy-ion collisions

2018

Progress in Particle and Nuclear Physics

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102

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“…Among them, determination of temperature and shear viscosity over entropy density ratio η s are of very interesting in heavy-ion collision. For the former, many efforts have been carried out by studies of various thermometers [12,19,20], and for the latter, it is found that the ratio of shear viscosity over entropy density of any fluids seems to have the bound of 1 (4π) , proposed by Kovtun-Son-Starinets (KSS) in a certain supersymmetric gauge theory [21]. Many efforts to study the quark gluon plasma phase transition through these quantities have been performed [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Mean free path and shear viscosity in central $^{129}$Xe+$^{119}$Sn collisions below 100 MeV/nucleon

Liu,

Ma,

Bonasera

et al. 2018

Preprint

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Thermal and transport properties of hot nuclear matter formed in central 129 Xe + 119 Sn collisions at the Fermi energy are investigated using the isospin-dependent quantum molecular dynamical (IQMD) model. Temperature (T ), average density (ρ), chemical potential (µ), mean momentum (P ), shear viscosity (η) and entropy density (s) are obtained from the phase-space information. The mean free path (λnn) and the in-medium nucleon-nucleon cross section (σnn) in the highest compressible stage at different incident energies are deduced and compared with the experimental results from Phys. Rev. C 90 (2014) 064602. The result shows that λnn and σnn have the same trend and similar values as the experimental results when the beam energy is greater than 40 MeV/u at maximum compressed state. Furthermore, the derived shear viscosity over entropy density (η/s) shows a decreasing behaviour to a saturated value around 3 4π as a function of incident energy.

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A scaling phenomenon for the cross section of fragment produced in projectile fragmentation reactions

Song

Wei

2019

Sci. China Phys. Mech. Astron.

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Temperature of intermediate mass fragments in simulated 40Ca + 40Ca reactions around the Fermi energies by AMD model

Cited by 19 publications

References 30 publications

Shannon information entropy in heavy-ion collisions

Shannon information entropy in heavy-ion collisions

Mean free path and shear viscosity in central $^{129}$Xe+$^{119}$Sn collisions below 100 MeV/nucleon

A scaling phenomenon for the cross section of fragment produced in projectile fragmentation reactions

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