Impact Parameter Dependence of the Double Neutron/Proton Ratio of Nucleon Emissions in Isotopic Reaction Systems

ZHANG Xun-Chao; LI Bao-An; CHEN Lie-Wen; YONG Gao-Chan

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Impact Parameter Dependence of the Double Neutron/Proton Ratio of Nucleon Emissions in Isotopic Reaction Systems

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Within the transport model IBUU04, we investigate the double neutron/proton ratio of free nucleons taken from two reaction systems using two Sn isotopes at a beam energy of 50 MeVucleon and with impact parameters 2fro, 4fro and 8fm, respectively. It is found that the double neutron/proton ratio from peripheral collisions is more sensitive to the density dependence of the symmetry energy than those from mid-central and central collisions.

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《中国物理快报：英文版》 |2009年第5期|60-63|共4页
作者
ZHANG Xun-Chao; LI Bao-An; CHEN Lie-Wen; YONG Gao-Chan;
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作者单位

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000;

Graduate School of Chinese Academy of Sciences, Beijing 100049;

Department of Physics, Texas A&M University-Commerce, Commerce, Texas 75429-3011, USA;

Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240;

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000;

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000;

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中图分类物理学;
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Impact Parameter Dependence of the Double Neutron/Proton Ratio of Nucleon Emissions in Isotopic Reaction Systems

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