| 40, 48Ca+90, 96Zr近垒熔合反应的动力学研究 |
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| 引用本文： | 王宁,李祝霞,吴锡真.40, 48Ca+90, 96Zr近垒熔合反应的动力学研究[J].原子核物理评论,2003,20(2):121-131. |
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| 作者姓名： | 王宁 李祝霞 吴锡真 |
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| 作者单位： | 1 兰州重离子加速器国家实验室原子核理论中心; 甘肃兰州;2 中国原子能科学研究院; 北京;3 中国科学院理论物理研究所; 北京100080; |
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| 基金项目： | 国家自然科学基金资助项目(19975073,10175093,10175089,10235020,10235030)，核工业科学基金资助项目，国家重点基础研究发展规划资助项目(G20000774) |
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| 摘 要： | 发展了一种改进的量子分子动力学模型,并用这一模型研究了40,48Ca+90,96Zr的近垒熔合反应.改进的量子分子动力学模型能很好地描述一系列核,从6Li到208Pb,的基态性质及它们的时间演化.在相同参数下计算得到的40Ca+90Zr以及40Ca+96Zr这两个熔合反应的激发函数与实验结果都符合得相当好.在分析丰中子核熔合截面增强机制中,发现丰中子核熔合反应初始阶段颈部的N/Z值明显偏大,促使反应中动态位垒降低,从而引起了丰中子核反应熔合截面的增强. An improved Quantum Molecular Dynamics (QMD) model is proposed and the fusion reactions 40, 48Ca+90, 96Zr are studied by using this model. With our improved QMD model, the ground state properties and their time evolution of nuclei from 6Li to 208Pb can be reproduced reasonably well and the excitation functions of fusion cross section for reactions40Ca+96Zr and 40Ca+96Zr at near barrier can be reproduced remarkably well with the same set of parameters...
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| 关 键 词： | 量子分子动力学模型 熔合截面 颈部N/Z值 动态位垒 |
| 文章编号： | 1007-4627(2003)02-0121-11 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2003年1月25日 |
Dynamic Study of Fusion Reactions for 40,48Ca+90,96Zr around Coulomb Barrier |
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| Institution: | 1 Center of Theoretical Nuclear Physics; National Laboratory of Heavy Ion Accelerator of Lanzhou; Lanzhou 730000 China;2 China Institute of Atomic Energy; Beijing 102413; China;3 Institute of Theoretical Physics; Chinese Academic of Sciences; Beijing; 100080; China |
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| Abstract: | An improved Quantum Molecular Dynamics (QMD) model is proposed and the fusion reactions 40, 48Ca+90, 96Zr are studied by using this model. With our improved QMD model, the ground state properties and their time evolution of nuclei from 6Li to 208Pb can be reproduced reasonably well and the excitation functions of fusion cross section for reactions40Ca+96Zr and 40Ca+96Zr at near barrier can be reproduced remarkably well with the same set of parameters... |
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| Keywords: | Quantum Molecular Dynamics model fusion cross section N/Z value of neck dynamic barrier |
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