| 重离子熔合反应与双核模型 |
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| 引用本文： | 赵恩广,李君清,W.Scheid. 重离子熔合反应与双核模型[J]. 原子核物理评论, 2005, 22(4): 315-322. DOI: 10.11804/NuclPhysRev.22.04.315 |
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| 作者姓名： | 赵恩广 李君清 W.Scheid |
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| 作者单位： | [1]中国科学院理论物理研究所,北京100080 [2]兰州重离子加速器国家实验室原子核理论中心,甘肃兰州730000 [3]Institute for Theoretical, Physics of Justus-Liebig University, Giessen 35392, Germany [4]北京大学物理学院,北京100871 |
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| 基金项目： | 国家自然科学基金资助项目（10235020,105050i6,10435010）;中国科学院知识创新工程重点方向性项目（KJCXZ-SW-Nol）;973国家重点研究发展规划资助项目（G2000077400）;科技部基础研究重大项目前期研究专项基金资助项目;德国DFG基金资助项目 |
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| 摘 要： | 简单介绍了兰州-北京-吉森合作组对合成超重核的重离子反应进行的初步研究。研究的重点是熔合阶段的反应机制。在原有双核模型的基础上做了一些改进，把耗散相对运动过程与核子转移过程耦合起来，从更微观的角度来描写双核系统向全熔合复合核的演化。在双核过程中的每一步求解主方程，不对驱动势做谐振子近似。同时，还探讨了原子核形变与相对取向对驱动势的影响，存活几率与复合核蒸发中子的奇偶效应，以及入射道中原子核非弹性激发对俘获截面的影响等。In recent years, the Lanzou-Beijing-Giessen collaboration has studied the heavy ion reactions which are lead to the formation of super-heavy nuclei. The study emphases the mechanism of the fusion stage of the reactions. Based on the so called Di-nuclear System Model, some improvements have been made. The main points are the coupling of the dissipation of relative motion energy, angular momentum with nucleon transfer, and solving the Master equation in every step of the nucleon transfer with exact driving potentials, in order to describe the evolution of the system more microscopically. At the same time, we also discussed the effects of nuclear deformation and their relative orientation on the driving potentials, and studied the survive probability of the compound nuclei and its old-even effects, as well as the influence of inelastic excitations of nuclei in entrance channels to the capture cross sections.
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| 关 键 词： | 重离子熔合反应 超重元素 主方程 准裂变 复合核衰变 |
| 文章编号： | 1007-4627（2005）04-0315-08 |
| 收稿时间： | 2005-10-19 |
| 修稿时间： | 2005-10-19 |
Heavy Ion Fusion Reaction and Di-nuclear System Model |
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| ZHAO En-guang,LI Jun-qing,W.Scheid. Heavy Ion Fusion Reaction and Di-nuclear System Model[J]. Nuclear Physics Review, 2005, 22(4): 315-322. DOI: 10.11804/NuclPhysRev.22.04.315 |
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| Authors: | ZHAO En-guang LI Jun-qing W.Scheid |
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| Affiliation: | 1 Institute of Theoretical Pysics, Chinese Academy of Sciences, Beijing 100080, China; 2 Center of Theoretical Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000, China; 3 Institute of Theoretical Physics of Justus-Liebig University, Giessen 35392, Germany; 4 School of Physics, Peking University, Beijing 100871, China |
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| Abstract: | In recent years, the Lanzou-Beijing-Giessen collaboration has studied the heavy ion reactions which are lead to the formation of super-heavy nuclei. The study emphases the mechanism of the fusion stage of the reactions. Based on the so called Di-nuclear System Model, some improvements have been made. The main points are the coupling of the dissipation of relative motion energy, angular momentum with nucleon transfer, and solving the Master equation in every step of the nucleon transfer with exact driving potentials, in order to describe the evolution of the system more microscopically. At the same time, we also discussed the effects of nuclear deformation and their relative orientation on the driving potentials, and studied the survive probability of the compound nuclei and its old-even effects, as well as the influence of inelastic excitations of nuclei in entrance channels to the capture cross sections. |
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| Keywords: | heavy ion fusion reaction super-heavy element Master equation quasi-fission decay of compound nuclei |
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