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Wen, K; Sakata, F; Li, ZX; Wu, XZ; Zhang, YX; Zhou, SG; Wen, K (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions
Source PublicationPHYSICAL REVIEW C
Language英语
Abstract

Applying a macroscopic reduction procedure to the improved quantum molecular dynamics ( ImQMD) model, the energy dependences of the nucleus-nucleus potential, the friction parameter, and the random force characterizing a one-dimensional Langevin-type description of the heavy-ion fusion process are investigated. Systematic calculations with the ImQMD model show that the fluctuation-dissipation relation found in symmetric head-on fusion reactions at energies just above the Coulomb barrier fades out when the incident energy increases. It turns out that this dynamical change with increasing incident energy is caused by a specific behavior of the friction parameter which directly depends on the microscopic dynamical process, i.e., on how the collective energy of the relative motion is transferred into the intrinsic excitation energy. It is shown microscopically that the energy dissipation in the fusion process is governed by two mechanisms: One is caused by the nucleon exchanges between two fusing nuclei, and the other is due to a rearrangement of nucleons in the intrinsic system. The former mechanism monotonically increases the dissipative energy and shows a weak dependence on the incident energy, while the latter depends on both the relative distance between two fusing nuclei and the incident energy. It is shown that the latter mechanism is responsible for the energy dependence of the fusion potential and explains the fading out of the fluctuation-dissipation relation.

2014
Volume90Issue:5Pages:54613
Cooperation Status国际
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1103/PhysRevC.90.054613
Indexed BySCI
Funding OrganizationNational Key Basic Research Program of China [2013CB834400] ; National Key Basic Research Program of China [2013CB834400] ; National Key Basic Research Program of China [2013CB834400] ; National Key Basic Research Program of China [2013CB834400] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; National Key Basic Research Program of China [2013CB834400] ; National Key Basic Research Program of China [2013CB834400] ; National Key Basic Research Program of China [2013CB834400] ; National Key Basic Research Program of China [2013CB834400] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; National Natural Science Foundation of China [11075215, 11121403, 11120101005, 11275052, 11275248, 11375062] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KJCX2-EW-N01] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046] ; Chinese Academy of Sciences (CAS) Visiting Professorship for Senior International Scientists [2013T1J0046]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/21253
Collection计算平台成果
Corresponding AuthorWen, K (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Wen, K,Sakata, F,Li, ZX,et al. Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions[J]. PHYSICAL REVIEW C,2014,90(5):54613.
APA Wen, K.,Sakata, F.,Li, ZX.,Wu, XZ.,Zhang, YX.,...&Wen, K .(2014).Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions.PHYSICAL REVIEW C,90(5),54613.
MLA Wen, K,et al."Energy dependence of the nucleus-nucleus potential and the friction parameter in fusion reactions".PHYSICAL REVIEW C 90.5(2014):54613.
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