Pairing-energy coefficients of neutron-rich fragments in spallation reactions

doi:10.1088/1674-1137/42/3/034102

	Pairing-energy coefficients of neutron-rich fragments in spallation reactions
	Niu, Fei 1,2; Ma, Chun-Wang 1
刊名	CHINESE PHYSICS C
	2018-03-01
卷号	42 页码:7
关键词	pairing energy neutron-rich isotope spallation reaction asymmetric nuclear matter
ISSN号	1674-1137
DOI	10.1088/1674-1137/42/3/034102
英文摘要	The ratio of pairing-energy coefficient to temperature (a(p)/T) of neutron-rich fragments produced in spallation reactions has been investigated by adopting an isobaric yield ratio method deduced in the framework of a modified Fisher model. A series of spallation reactions, 0.5A and 1A GeV Pb-208 + p, 1A GeV U-238 + p, 0.5A GeV Xe-136 + d, 0.2A, 0.5A and 1A GeV Xe-136 + p, and Fe-56 + p with incident energy ranging from 0.3A to 1.5A GeV, has been analysed. An obvious odd-even staggering is shown in the fragments with small neutron excess (I equivalent to N-Z), and in the relatively small-A fragments which have large I. The values of a(p)/T for the fragments, with I from 0 to 36, have been found to be in a range from -4 to 4, and most values of a(p)/T fall in the range from -1 to 1. It is suggested that a small pairing-energy coefficient should be considered in predicting the cross sections of fragments in spallation reactions. It is also concluded that the method proposed in this article is not good for fragments with A/A(s) > 85% (where As is the mass number of the spallation system).
资助项目	National Natural Science Foundation of China[U1732135] ; Natural Science Foundation of Henan Province[162300410179] ; Henan Normal University for the Excellent Youth[154100510007]
WOS关键词	ISOTOPIC YIELDS ; MASS FRAGMENTS ; NUCLEI ; PROTON ; MULTIFRAGMENTATION ; RESIDUES ; ENTROPY ; MODEL
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000427537900007
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Henan Province ; Henan Normal University for the Excellent Youth
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/46349]
专题	中国科学院近代物理研究所
通讯作者	Ma, Chun-Wang
作者单位	1.Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Niu, Fei,Ma, Chun-Wang. Pairing-energy coefficients of neutron-rich fragments in spallation reactions[J]. CHINESE PHYSICS C,2018,42:7.
APA	Niu, Fei,&Ma, Chun-Wang.(2018).Pairing-energy coefficients of neutron-rich fragments in spallation reactions.CHINESE PHYSICS C,42,7.
MLA	Niu, Fei,et al."Pairing-energy coefficients of neutron-rich fragments in spallation reactions".CHINESE PHYSICS C 42(2018):7.