Nuclear Stopping as a Probe for In-Medium Nucleon-Nucleon Cross Sections in Intermediate Energy Heavy Ion Collisions

Liu, Jianye; Guo, Weihua; Wang, Shun-Jin; Zuo, Wei; Zhao, Qiang; Yang, Yanchu

doi:10.1103/physrevlett.86.975

Cited by 104 publications

(46 citation statements)

References 21 publications

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“…These findings are in agreement with the studies recorded in Ref. [13]. By using the isospin-dependent quantum molecular dynamics model, we have studied the effect of charge asymmetry and isospin-dependent cross section on nuclear stopping and multiplicity of free nucleons and LMFs.…”

supporting

confidence: 91%

“…As noted in the Refs. [13,17,18], the production of free nucleons and LMFs behave in similar fashion as nuclear stopping parameters, we display in Fig. 3 the variation of stopping parameters as a function of Z for two different cross sections σ iso and σ noiso for both series of reactions.…”

mentioning

confidence: 86%

“…Liu et al [13] studied the nuclear stopping for various colliding systems with different neutron-proton ratios over * suneel.kumar@thapar.edu large domains of incident energy. Nuclear stopping was found to be very sensitive toward the isospin content of in-medium nucleon-nucleon cross section above Fermi energy.…”

mentioning

confidence: 99%

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Influence of charge asymmetry and isospin-dependent cross section on nuclear stopping

2011

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Using the isospin-dependent quantum molecular dynamics model, we study the effect of charge asymmetry and isospin-dependent cross section on nuclear stopping and multiplicity of free nucleons and light mass fragments. Simulations were carried out for the reactions 124 X m + 124 X m , where m varies from 47 to 59 and for 40 Y n + 40 Y n , where n varies from 14 to 23. Our study shows that nuclear stopping depends strongly on the isospin of the cross section.

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supporting

confidence: 91%

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confidence: 86%

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Influence of charge asymmetry and isospin-dependent cross section on nuclear stopping

2011

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“…Previous studies have already found that the in-medium NN cross sections influence both the degree and rate of isospin equilibrium [46][47][48][49][50][51], see, e.g., Ref. [52] for a review.…”

Section: Effects Of the In-medium Nn Cross Sections On Isospin Tramentioning

confidence: 99%

Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies

Chen

2005

Phys. Rev. C

265

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Nucleon-nucleon (NN) cross sections are evaluated in neutron-rich matter using a scaling model according to density, momentum, and isospin dependent nucleon effective masses. It is found that the in-medium NN cross sections are not only reduced but also have a different isospin dependence compared with the free-space ones. Because of the neutron-proton effective mass splitting the difference between nn and pp scattering cross sections increases with the increasing isospin asymmetry of the medium. Within the transport model IBUU04, the in-medium NN cross sections are found to influence significantly the isospin transport in heavy-ion reactions. With the in-medium NN cross sections, a symmetry energy of E sym (ρ) ≈ 31.6(ρ/ρ 0 ) 0.69 was found most acceptable compared with both the MSU isospin diffusion data and the presently acceptable neutron-skin thickness in 208 Pb. The isospin dependent part K asy (ρ 0 ) of isobaric nuclear incompressibility was further narrowed down to −500 ± 50 MeV. The possibility of determining simultaneously the in-medium NN cross sections and the symmetry energy was also studied. The proton transverse flow, or even better the combined transverse flow of neutrons and protons, can be used as a probe of the in-medium NN cross sections without much hindrance from the uncertainties of the symmetry energy.

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“…Its major advantage is the weak dependence on the uncertainties of the symmetry energy (for example, see Refs. [23,24,25]). Fig.…”

Section: Introductionmentioning

confidence: 99%

Medium modifications of the nucleon–nucleon elastic cross section in neutron-rich intermediate energy HICs

Li¹,

Li²,

Soff³

et al. 2006

J. Phys. G: Nucl. Part. Phys.

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Several observables of unbound nucleons which are to some extent sensitive to the medium modifications of nucleon-nucleon elastic cross sections in neutron-rich intermediate energy heavy ion collisions are investigated. The splitting effect of neutron and proton effective masses on cross sections is discussed. It is found that the transverse flow as a function of rapidity, the Q zz as a function of momentum, and the ratio of halfwidths of the transverse to that of longitudinal rapidity distribution R t/l are very sensitive to the medium modifications of the cross sections. The transverse momentum distribution of correlation functions of two-nucleons does not yield information on the in-medium cross section.

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Nuclear Stopping as a Probe for In-Medium Nucleon-Nucleon Cross Sections in Intermediate Energy Heavy Ion Collisions

Cited by 104 publications

References 21 publications

Influence of charge asymmetry and isospin-dependent cross section on nuclear stopping

Influence of charge asymmetry and isospin-dependent cross section on nuclear stopping

Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies

Medium modifications of the nucleon–nucleon elastic cross section in neutron-rich intermediate energy HICs

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