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2024年10月30日

Probing the Symmetrical Potential in Nuclear Reaction Iinduced by Neutron-Halo Nuclei

  • In terms of the isospin-dependent quantum molecular dynamics model (IQMD), important isospin effect in the halo-neutron nucleus induced reaction mechanism is investigated, and consequently, the symmetrical potential form is extracted in the intermediate energy heavy ion collision. Because the interactive potential and in-medium nucleon-nucleon (N-N) cross section in the IQMD model sensitively depend on the density distribution of the colliding system, this type of study is much more based on the extended density distribution with a looser inner nuclear structure of the halo-neutron nucleus. Such a density distribution includes averaged characteristics of the isospin effect of the reaction mechanism and the looser inner nuclear structure. In order to understand clearly the isospin effect of the halo-neutron nucleus induced reaction mechanism, the effects caused by the neutron-halo nucleus and by the stable nucleus with the same mass are compared under the same condition of the incident channel. It is found that in the concerned beam energy region, the ratio of the emitted neutrons and protons and the ratio of the isospin fractionations in the neutron-halo nucleus case are considerably larger than those in the stable nucleus case. Therefore, the information of the symmetry potential in the heavy ion collision can be extracted through such a procedure.
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LIU Jian-Ye, XIAO Guo-Qing, ZUO Wei and LI Xi-Guo. Probing the Symmetrical Potential in Nuclear Reaction Iinduced by Neutron-Halo Nuclei[J]. Chinese Physics C, 2007, 31(2): 150-154.
LIU Jian-Ye, XIAO Guo-Qing, ZUO Wei and LI Xi-Guo. Probing the Symmetrical Potential in Nuclear Reaction Iinduced by Neutron-Halo Nuclei[J]. Chinese Physics C, 2007, 31(2): 150-154. shu
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Received: 2006-04-06
Revised: 2006-05-12
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Probing the Symmetrical Potential in Nuclear Reaction Iinduced by Neutron-Halo Nuclei

    Corresponding author: LIU Jian-Ye,
  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Institute of Basic Physics, College of Mathematics-Physics and Information,Tianshui Normal University, Tianshui 741000, China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000, China

Abstract: In terms of the isospin-dependent quantum molecular dynamics model (IQMD), important isospin effect in the halo-neutron nucleus induced reaction mechanism is investigated, and consequently, the symmetrical potential form is extracted in the intermediate energy heavy ion collision. Because the interactive potential and in-medium nucleon-nucleon (N-N) cross section in the IQMD model sensitively depend on the density distribution of the colliding system, this type of study is much more based on the extended density distribution with a looser inner nuclear structure of the halo-neutron nucleus. Such a density distribution includes averaged characteristics of the isospin effect of the reaction mechanism and the looser inner nuclear structure. In order to understand clearly the isospin effect of the halo-neutron nucleus induced reaction mechanism, the effects caused by the neutron-halo nucleus and by the stable nucleus with the same mass are compared under the same condition of the incident channel. It is found that in the concerned beam energy region, the ratio of the emitted neutrons and protons and the ratio of the isospin fractionations in the neutron-halo nucleus case are considerably larger than those in the stable nucleus case. Therefore, the information of the symmetry potential in the heavy ion collision can be extracted through such a procedure.

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