Nucleon-nucleon momentum-correlation function as a probe of the density distribution of valence neutrons in neutron-rich nuclei

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	Nucleon-nucleon momentum-correlation function as a probe of the density distribution of valence neutrons in neutron-rich nuclei
	Cao, XG（曹喜光） ; Cai, XZ（蔡翔舟） ; Ma, YG（马余刚） ; Fang, DQ（方德清） ; Zhang, GQ（张国强） ; Guo, W（郭威） ; Chen, JG（陈金根） ; Wang, JS
刊名	PHYSICAL REVIEW C
	2012
卷号	86 期号:4
ISSN号	0556-2813
英文摘要	Proton-neutron, neutron-neutron, and proton-proton momentum-correlation functions (C-pn, C-nn, and C-pp) are systematically investigated for C-15 and other C-isotope-induced collisions at different entrance channel conditions within the framework of the isospin-dependent quantum-molecular-dynamics model complemented by the correlation after burner (CRAB) computation code. C-15 is a prime exotic nucleus candidate due to the weakly bound valence neutron coupling with closed-neutron-shell nucleus C-14. To study density dependence of the correlation function by removing the isospin effect, the initialized C-15 projectiles are sampled from two kinds of density distribution from the relativistic mean-field (RMF) model in which the valence neutron of C-15 is populated in both 1d5/2 and 2s1/2 states, respectively. The results show that the density distributions of the valence neutron significantly influence the nucleon-nucleon momentum-correlation function at large impact parameters and high incident energies. The extended density distribution of the valence neutron largely weakens the strength of the correlation function. The size of the emission source is extracted by fitting the correlation function by using the Gaussian source method. The emission source size as well as the size of the final-state phase space are larger for projectile samplings from more extended density distributions of the valence neutron, which corresponds to the 2s1/2 state in the RMF model. Therefore, the nucleon-nucleon momentum-correlation function can be considered as a potentially valuable tool to diagnose exotic nuclear structures, such as the skin and halo.
语种	英语
WOS记录号	WOS:000309998900003
公开日期	2013-12-05
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13227]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Cao, XG,Cai, XZ,Ma, YG,et al. Nucleon-nucleon momentum-correlation function as a probe of the density distribution of valence neutrons in neutron-rich nuclei[J]. PHYSICAL REVIEW C,2012,86(4).
APA	Cao, XG.,Cai, XZ.,Ma, YG.,Fang, DQ.,Zhang, GQ.,...&Wang, JS.(2012).Nucleon-nucleon momentum-correlation function as a probe of the density distribution of valence neutrons in neutron-rich nuclei.PHYSICAL REVIEW C,86(4).
MLA	Cao, XG,et al."Nucleon-nucleon momentum-correlation function as a probe of the density distribution of valence neutrons in neutron-rich nuclei".PHYSICAL REVIEW C 86.4(2012).