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重离子熔合反应的动力学势垒
  • ISSN号：1674-1056
  • 期刊名称：《中国物理B：英文版》
  • 时间：0
  • 分类：O572.32[理学—粒子物理与原子核物理;理学—物理]
  • 作者机构：[1]山西师范大学物理与信息工程学院,山西临汾041004, [2]北京交通大学交通运输学院,北京100044, [3]山西长治学院物理系,山西长治046000, [4]中国原子能科学研究院,北京102413
  • 相关基金：国家自然科学基金资助（10275042,10475054）;山西省自然科学基金资助（20021006）
作者： 李晓琳[1], 薛毅娴[2], 田俊龙[3,4]
关键词： 量子分子动力学模型, 动力学势垒, 颈部, QMD model, dynamic barrier, neck
中文摘要：

用改进的量子分子动力学模型研究了与入射能量相关的重离子熔合反应^86Kr＋^100Mo的动力学势垒．在库仑势垒附近。随着入射能的降低可以观察到动力学势垒的最低值，这个最低动力学势垒与绝热势垒非常接近；另一方面，动力学势垒随着入射能的增加而升高，最终接近于静态势垒（非绝热势垒）．发现颈部的形成和体系的动力学形变是促使动力学势垒降低的主要原因．基于动力学势垒的研究，对于重离子熔合反应的势垒贯穿给出了一种全新的解释．

英文摘要：

Based on the improved quantum molecular dynamics model, the incident energy dependences of dynamic potential barriers in the entrance channel of fusion reaction are investigated. It is found ＇that the lowest dynamic barrier is obtained which approaches to the adiabatic static barrier with the incident energy decreasing and the dynamic barrier goes up to the diabatic static barrier with increase of the incident energy. A new explaining of tunneling process for the fusion at the incident energy below the static and above the lowest dynamic bartier is presented. In order to understand the energy dependence of the dynamical barrier we also pay a great attention to study the neck formation and shape deformation during the dynamic lowering of the barrier.

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期刊信息
  • 《中国物理B：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会和中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京 中关村 中国科学院物理研究所内
  • 邮编：100080
  • 邮箱：
  • 电话：010-82649026 82649519
  • 国际标准刊号：ISSN：1674-1056
  • 国内统一刊号：ISSN：11-5639/O4
  • 邮发代号:
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  • 被引量:406