中国物理B ›› 2005, Vol. 14 ›› Issue (8): 1549-1553.doi: 10.1088/1009-1963/14/8/013

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Several observables sensitive to the symmetry energy in heavy-ion collisions induced by high energy radioactive beams

李宝安1, 雍高产2, 左维2   

  1. (1)Department of Chemistry and Physics, Arkansas State University, State University, Arkansas 72467-0419, USA; (2)Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;Graduate School, Chinese Academy of Sciences, Beijing 100039}, China
  • 收稿日期:2005-01-12 修回日期:2005-03-03 出版日期:2005-07-13 发布日期:2005-07-13
  • 基金资助:
    Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No KJCX2-SW-N02), the\linebreak State Key Development Program of Basic Research of China (Grant No G2000077400), the National Natural Science Foundation of

Several observables sensitive to the symmetry energy in heavy-ion collisions induced by high energy radioactive beams

Yong Gao-Chan (雍高产)ab, Li Bao-An (李宝安)c, Zuo Wei (左维)ab   

  1. a Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; b Graduate School, Chinese Academy of Sciences, Beijing 100039, Chinab Department of Chemistry and Physics, Arkansas State University, State University, Arkansas 72467-0419, USA
  • Received:2005-01-12 Revised:2005-03-03 Online:2005-07-13 Published:2005-07-13
  • Supported by:
    Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No KJCX2-SW-N02), the\linebreak State Key Development Program of Basic Research of China (Grant No G2000077400), the National Natural Science Foundation of

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摘要： Using an isospin- and momentum-dependent hadronic transport model,effects of the symmetry energy on several observables in heavy-ion collisions induced by radioactive beams at intermediate energies are studied. It is found that rapidity distribution of the isospin asymmetry of nucleon emissions, transverse momentum distribution of the ratio of free neutrons to protons at mid-rapidity, kinetic energy distribution of the ratio of \pi^{-}/\pi^{+} as well as evolution of the isospin fractionation are all sensitive to the symmetry energy.

关键词: momentum dependence, hadronic transport model, symmetry energy

Abstract: Using an isospin- and momentum-dependent hadronic transport model,effects of the symmetry energy on several observables in heavy-ion collisions induced by radioactive beams at intermediate energies are studied. It is found that rapidity distribution of the isospin asymmetry of nucleon emissions, transverse momentum distribution of the ratio of free neutrons to protons at mid-rapidity, kinetic energy distribution of the ratio of $\pi^{-}/\pi^{+}$ as well as evolution of the isospin fractionation are all sensitive to the symmetry energy.

Key words: momentum dependence, hadronic transport model, symmetry energy

中图分类号:  (Low and intermediate energy heavy-ion reactions)

  • 25.70.-z
21.65.-f (Nuclear matter) 27.60.+j (90 ≤ A ≤ 149) 14.20.Dh (Protons and neutrons) 24.30.Cz (Giant resonances)