Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (5): 050509 doi: 10.13538/j.1001-8042/nst.2013.05.009

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012) • Previous Articles     Next Articles

Directed flow of isospin sensitive fragments within a modified clusterization algorithm in heavy-ion collisions  

KUMAR Sanjeev1,2  MA Yugang2,*     

  1. 1Amity Institute of Nuclear Science and Technology, Amity University, Noida, Uttar Pradesh-201303, India
    2Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China  
  • Received:2013-06-27
  • Contact: MA Yugang E-mail:ygma@sinap.ac.cn
  • Supported by:

    Supported by the Chinese Academy of Sciences Support program for young international scientists (No.2010Y2JB02), National Natural Science Foundation of China (NSFC) projects (Nos.11220101005, 11035009 and 10979074) and the Knowledge Innovation project of the Chinese Academy of Sciences (No.KJCX2-E W-N01).

     

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KUMAR Sanjeev, MA Yugang. Directed flow of isospin sensitive fragments within a modified clusterization algorithm in heavy-ion collisions  .Nuclear Science and Techniques, 2013, 24(5): 050509     doi: 10.13538/j.1001-8042/nst.2013.05.009

Abstract:

By extending the minimum spanning tree (MST)clusterization algorithm for the binding energy cut, the isospin asymmetry dependence of directed flow for isospin sensitive isobar pairs (neutrons-protons, 3H-3He) is studied from low towards high incident energies. The modified clusterization method (MSTB) has the advantage to identify the fragments at quite early time. It enhances (reduces) the production of free nucleons (fragments) over MST method. The directed flow of isobaric pair 3H-3He is more sensitive towards isospin asymmetry caused by MSTB than isobaric pair n-p. This sensitivity becomes quite strong towards the high incident energy and neutron-rich reaction system. In conclusion, the inclusion of binding energy in clusterization method for the flow studies has been uniquely important for understanding the isospin physics, especially for high density behavior of symmetry energy.

Key words: Binding energy, Isospin Physics, Symmetry energy, Directed flow