| 重核熔合耗散动力学 |
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| 引用本文： | 包景东.重核熔合耗散动力学[J].原子核物理评论,2003,20(2):132-136. |
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| 作者姓名： | 包景东 |
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| 作者单位： | 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; 北京师范大学物理系; 北京100875; 北京师范大学低能核物理研究所; |
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| 基金项目： | 国家自然科学基金资助项目(10235020)，教育部跨世纪优秀人才基金资助项目 |
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| 摘 要： | 用双中心核态参数描写重核熔合过程,以一个布朗粒子通过二次势位垒的简化模型得到了熔合几率的解析表达式.在两碰撞核的接触处,颈部变量的变化遵守高斯分布,而沿拉长方向的初始平均动能由表面摩擦模型所确定.计算了几个对称和近似对称的反应系统的熔合激发函数,并与实验结果进行了比较.讨论了颈部增长和初始能量损失对熔合障碍产生的效应. Dissipative dynamics of fusion of massive nuclei is studied in terms of the two center shape parameterization. Fusion probability is obtained analytically from a Brownian particle passing over a parabolic potential barrier along the elongation coordinate. The neck variable at the initial contact shape is supposed to be a Gaussian distribution. Fusion probabilities of several symmetric or nearly symmetric systems in central collisions are calculatedand compared with experimental data. Effects of neck folding...
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| 关 键 词： | 熔合几率 双中心模型 颈部 朗之万方程 |
| 文章编号： | 1007-4627(2003)02-0132-05 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2003年3月10日 |
Dissipative Dynamics of Fusion of Massive Nuclei |
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| BAO Jing-dong.Dissipative Dynamics of Fusion of Massive Nuclei[J].Nuclear Physics Review,2003,20(2):132-136. |
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| Authors: | BAO Jing-dong |
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| Institution: | ( Center of Theoretical Nuclear Physics; National Laboratory of Heavy Ion Accelerator of Lanzhou; Lanzhou 730000; China; Department of Physics; Beijing Normal University; Beijing 100875; Institute of Low Energy Nuclear Physics; China); |
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| Abstract: | Dissipative dynamics of fusion of massive nuclei is studied in terms of the two center shape parameterization. Fusion probability is obtained analytically from a Brownian particle passing over a parabolic potential barrier along the elongation coordinate. The neck variable at the initial contact shape is supposed to be a Gaussian distribution. Fusion probabilities of several symmetric or nearly symmetric systems in central collisions are calculatedand compared with experimental data. Effects of neck folding... |
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| Keywords: | fusion probability two-center model neck Langevin equation |
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