Properties of the composite systems formed in the reactions of (238)U+(238)U and (232)Th+(250)Cf
文献类型：期刊论文
| 作者 | Tian, Junlong; Wu, Xizhen; Zhao, Kai; Zhang, Yingxun; Li, Zhuxia; Tian, JL , Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2008 |
| 卷号 | 77期号:6页码:- |
| 关键词 | Heavy-ion Collisions Molecular-dynamics Shell-model Superheavy Elements Fragment Formation Fusion-fission U-238 Nuclei Search Decay |
| ISSN号 | 0556-2813 |
| 英文摘要 | Strongly damped reactions of (238)U+(238)U, (232)Th+(250)Cf at E(c.m.)=680-1880 MeV have been studied based on the improved quantum molecular dynamics model. The formation and properties of the transiently formed composite system during the reaction process are carefully studied. We find that at a certain energy region, the entrance channel potential is weakly repulsive, and the dissipation is very strong after touching configuration. These two effects delay the re-separation time for a composite system. The single-particle potential well of the transiently formed composite system has a Coulomb barrier about 15-20 MeV high at the surface, which causes the excited unbound protons still embedded in the potential well to move in a common mono-single-particle potential for a period of time and thus restrains the quick decay of the composite system. The incident-energy dependence of the lifetime of the composite system and how the lifetime correlates with the shape configuration, the momentum distribution of the composite system, and the angular distribution of primary fragments are carefully investigated. The results indicate that the longest average lifetime for the transient composite system of U+U can reach about 1200 fm/c at properly selected incident energies. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000257290000039 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5520]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Tian, JL , Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Junlong,Wu, Xizhen,Zhao, Kai,et al. Properties of the composite systems formed in the reactions of (238)U+(238)U and (232)Th+(250)Cf[J]. PHYSICAL REVIEW C,2008,77(6):-. |
| APA | Tian, Junlong,Wu, Xizhen,Zhao, Kai,Zhang, Yingxun,Li, Zhuxia,&Tian, JL , Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China.(2008).Properties of the composite systems formed in the reactions of (238)U+(238)U and (232)Th+(250)Cf.PHYSICAL REVIEW C,77(6),-. |
| MLA | Tian, Junlong,et al."Properties of the composite systems formed in the reactions of (238)U+(238)U and (232)Th+(250)Cf".PHYSICAL REVIEW C 77.6(2008):-. |
入库方式： OAI收割
来源：理论物理研究所
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