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A new probe of neutron skin thickness

A new probe of neutron skin thickness
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摘要 The correlation between neutron-to-proton yield ratio （Rnp） and neutron skin thickness （δnp） in neutron-rich projectile induced reactions is investigated within the framework of the Isospin-Dependent Quantum Molecular Dynamics （IQMD） model. The density distribution of the Droplet model is embedded in the initialization of the neutron and proton densities in the present IQMD model. By adjusting the diffuseness parameter of neutron density in the Droplet model for the projectile, the relationship between the neutron skin thickness and the corresponding Rnp is obtained. The results show strong linear correlation between Rnp and δnp for neutron-rich Ca and Ni isotopes. It is suggested that Rnp may be used as an experimental observable to extract δnp for neutron-rich nuclei, which is very interesting in the study of the nuclear structure of exotic nuclei, the equation of state （EOS） of asymmetric nuclear matter and neutron-rich matter in astrophysics, etc. The correlation between neutron-to-proton yield ratio （Rnp） and neutron skin thickness （δnp） in neutron-rich projectile induced reactions is investigated within the framework of the Isospin-Dependent Quantum Molecular Dynamics （IQMD） model. The density distribution of the Droplet model is embedded in the initialization of the neutron and proton densities in the present IQMD model. By adjusting the diffuseness parameter of neutron density in the Droplet model for the projectile, the relationship between the neutron skin thickness and the corresponding Rnp is obtained. The results show strong linear correlation between Rnp and δnp for neutron-rich Ca and Ni isotopes. It is suggested that Rnp may be used as an experimental observable to extract δnp for neutron-rich nuclei, which is very interesting in the study of the nuclear structure of exotic nuclei, the equation of state （EOS） of asymmetric nuclear matter and neutron-rich matter in astrophysics, etc.
作者 孙小艳 方德清 马余刚 蔡翔舟 陈金银 郭威 张国强 周培
机构地区 Shanghai Institute of Applied Physics Graduate University of Chinese Academy of Sciences
出处 《Chinese Physics C》 SCIE CAS CSCD 2011年第6期555-560,共6页 中国物理C（英文版）
基金 Supported by National Natural Science Foundation of China (10775168, 10775167, 10979074, 10747163, 11035009) Major State Basic Research Development Program in China (2007CB815004) Shanghai Development Foundation for Science and Technology (09JC1416800)
关键词 IQMD neutron-to-proton yield ratio neutron skin thickness IQMD neutron-to-proton yield ratio neutron skin thickness
分类号 O571.5 [理学—粒子物理与原子核物理]
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Chinese Physics C
2011年 第6期

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