Mean-field description of heavy-ion scattering at low energies and fusion

作     者：Dao T.Khoa Le Hoang Chien Do Cong Cuong Nguyen Hoang Phuc 

作者机构：Institute for Nuclear Science and Technology VINATOM Department of Nuclear Physics and Nuclear EngineeringFaculty of Physics and Engineering Physics University of Science VNU-HCM 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2018年第29卷第12期

页      面：102-111页

核心收录：

学科分类：080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：supported in part by the National Foundation for Scientific and Technological Development(NAFOSTED Project No.103.04-2017.317) 

主　　题：精力 熔化 散布 重离子 状态密度 密度依赖 相互作用 天体物理学 

摘      要：The nuclear mean-field potential built up during the ^(12)C+^(12)C and ^(16)O+^(16)O collisions at low energies relevant for the carbon-and oxygen-burning processes is constructed within the double-folding model(DFM) using the realistic ground-state densities of^(12)C and^(16)O, and CDM3Yn density-dependent nucleon–nucleon(NN) interaction. The rearrangement term, indicated by the Hugenholtz–van Hove theorem for the single-particle energy in nuclear matter, is properly considered in the DFM calculation. To validate the use of the density-dependent NN interaction at low energies, an adiabatic approximation was suggested for the dinuclear overlap density. The reliability of the nucleus–nucleus potential predicted through this low-energy version of the DFM was tested in the optical model(OM) analysis of the elastic^(12)C+^(12)C and ^(16)O+^(16)O scattering data at energies below 10 MeV/*** OM results provide a consistently good description of the elastic angular distributions and 90 excitation function. The dinuclear mean-field potential predicted by the DFM is further used to determine the astrophysical S factor of the ^(12)C+^(12)C and ^(16)O+^(16)O fusions in the barrier penetration model. Without any adjustment of the potential strength, our results reproduce the non-resonant behavior of the S factor of the ^(12)C+^(12)C and ^(16)O+^(16)O fusions very well over a wide range of energies.