A new probe of neutron skin thickness

• Published in: Chinese physics C Vol. 35; no. 6; pp. 555 - 560
• Main Author: 孙小艳 方德清 马余刚 蔡翔舟 陈金根 郭威 田文栋 王宏伟 张国强 周培
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2011; Graduate University of Chinese Academy of Sciences Beijing 100049, China%Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
• Subjects: Asymmetry; Correlation; Density; Diffusion; Droplets; IQMD模型; Nickel; Nuclei; Projectiles; 中子皮厚度; 丰中子核; 密度分布; 探测; 液滴模型; 量子分子动力学模型; 非对称核物质状态方程; IQMD; neutron-to-proton yield ratio; neutron skin thickness
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/35/6/009

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.