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题名: Superheavy fragments produced in the asymmetric strongly damped collision
作者: Tian Jun-Long ;  Wu Xi-Zhen ;  Li Zhu-Xia ;  Zhao Kai
刊名: CHINESE PHYSICS C
出版日期: 2008
卷号: 32, 期号:1, 页码:34-39
关键词: DINUCLEAR SYSTEM ;  U-238 ;  ELEMENTS ;  NUCLEI ;  STATE
学科分类: Physics
通讯作者: Tian, JL , China Inst Atom Energy, Beijing 102413, Peoples R China
部门归属: [Tian, JL; Wu, XZ; Li, ZX; Zhao, K] China Inst Atom Energy, Beijing 102413, Peoples R China; [Wu, XZ; Li, ZX] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Li, ZX] Natl Lab Heavy Ion Accelarator Lanzhou, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
英文摘要: The strongly damped collisions of very heavy nuclei Th-232+Cf-250 at the energy range of 680-1880 MeV have been studied within the improved quantum molecular dynamics model. The production probability of primary superheavy fragments with Z >= 114 (SHFs) for the asymmetric reaction Th-232+Cf-250 is higher than that for the symmetric reaction Pu-244+Pu-244 and U-238+U-238. The calculated results show that the mass and charge distributions of primary fragments, the excitation energy distribution of SHFs depend on the incident energies strongly. Two stages of the decay process of composite systems are distinguished by very different decay slopes, which imply different decay mechanisms of the composite system. The first stage is for the decay of giant composite systems and the second one corresponds to the decay of fragments of giant composite systems including SHFs through emitting neutron, proton or other charged particles, and also through fission or fragmentation. The slow reduction of SHFs in the second stage seems to be helpful for the survival of primary superheavy fragments.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000253488900008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5607
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Tian Jun-Long,Wu Xi-Zhen,Li Zhu-Xia,et al. Superheavy fragments produced in the asymmetric strongly damped collision[J]. CHINESE PHYSICS C,2008,32(1):34-39.
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