Chin. Phys. Lett.  2009, Vol. 26 Issue (7): 072502    DOI: 10.1088/0256-307X/26/7/072502
NUCLEAR PHYSICS |
The influence of Isospin Dependence of In-Medium NN Cross Sections on the Ratio of Emitted Neutrons to Protons in HICs
JIA Yi-Jian1,2, ZHANG Ying-Xun2, LI Zhu-Xia2, LU Xiao-Hua2, LIU Fu-Hu1
1Institute of Theoretical Physics, Shanxi University, Taiyuan 0300062China Institute of Atomic Energy, PO Box 275(18), Beijing 102413
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JIA Yi-Jian, ZHANG Ying-Xun, LI Zhu-Xia et al  2009 Chin. Phys. Lett. 26 072502
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Abstract The influence of isospin dependence of in-medium nucleon-nucleon cross sections on the n/p ratios for emitted nucleons in reactions 96Zr+96Zr and 96Ru+96Ru at Eb=400AMeV is investigated by means of an improved quantum molecular dynamics model. Our results show that the high energy part of the spectra of the n/p ratios for emitted nucleons is sensitive to the isospin dependence of in-medium nucleon-nucleon cross sections for neutron-rich reaction systems. Therefore, we propose that the n/p ratio of emitted high energy nucleons in a very neutron-rich reaction system at several hundreds of AMeV can be taken as sensitive observables to constrain the isospindependence of in-medium nucleon-nucleon cross sections.
Keywords: 25.70.-z      21.30.Fe      21.65.+f      24.10.Lx     
Received: 12 February 2009      Published: 02 July 2009
PACS:  25.70.-z (Low and intermediate energy heavy-ion reactions)  
  21.30.Fe (Forces in hadronic systems and effective interactions)  
  21.65.+f  
  24.10.Lx (Monte Carlo simulations (including hadron and parton cascades and string breaking models))  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/7/072502       OR      https://cpl.iphy.ac.cn/Y2009/V26/I7/072502
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JIA Yi-Jian
ZHANG Ying-Xun
LI Zhu-Xia
LU Xiao-Hua
LIU Fu-Hu
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