Pairing-energy coefficients of neutron-rich fragments in spallation reactions
文献类型：期刊论文
| 作者 | Niu, Fei1,2; Ma, Chun-Wang1 |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 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). |
| WOS关键词 | ISOTOPIC YIELDS ; MASS FRAGMENTS ; NUCLEI ; PROTON ; MULTIFRAGMENTATION ; RESIDUES ; ENTROPY ; MODEL |
| 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研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000427537900007 |
| 出版者 | CHINESE PHYSICAL SOC |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Henan Province ; Henan Normal University for the Excellent Youth |
| 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. |
入库方式： OAI收割
来源：近代物理研究所
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