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EQMD模型在轻核奇异结构研究中的应用

Application of EQMD model to researches of nuclear exotic structures
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摘要 应用一种扩展的分子动力学模型(Extension of quantum molecular dynamics,EQMD)研究了轻核的晕结构和团簇结构。对于晕结构,详细讨论了晕结构核在EQMD模型框架下的初始化,给出了^14Be、^17B、^19C和^22C的晕核结构性质和物质密度分布,讨论了价中子波包宽度、核芯核子的波包宽度以及核芯的形态对于晕结构存在的重要性。对于团簇结构,给出了EQMD模型框架下对于轻的4n核的α团簇态的描述结果,讨论了不同团簇态的稳定性、结合能以及不同核子的波包宽度,指出了团簇态在自由演化过程中的α之间能量流动性质。并讨论了4-α正四面体结构作为^16O基态的可能性。 Background: Nuclear exotic structures become an important hotspot of nuclear physics, especially halo structure and α cluster states of light nuclei. Purpose: Many detailed properties of light nuclei structures are still not clear. To find a powerful way of nuclear structure research is very helpful. Methods: An extension of quantum molecular dynamics model (EQMD) is used for halo structure and α cluster states of light nuclei. Results: Nuclear matter density distributions with halo structure and cc cluster structure are studied. Binding energy of nuclei with exotic structure is studied. Conclusion: EQMD model is a good tool for studies of nuclear exotic structure.
作者 何万兵 曹喜光 马余刚 方德清 王宏伟 张国强 周铖龙 王闪闪 吕明 代智涛 刘应都 蔡翔舟 HE Wanbing, CAO Xiguang, MAYugang, FANG Deqing, WANG Hongwei, ZHANG Guoqiang, ZHOU Chenglong, WANG Shanshan, LYU Ming, DAI Zhitao, LIU Yingdu, CAI Xiangzhou(1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3Shanghai Tech University, Shanghai 200031, China; 4College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, China)
出处 《核技术》 CAS CSCD 北大核心 2014年第10期52-58,共7页 Nuclear Techniques
基金 国家重点基础研究发展规划项目计划(No.2013CB834405)、国家自然科学基金青年基金项目(No.11305239)及中国博士后科学基金项目(No.2012M520958)资助
关键词 奇异结构 晕结构 团簇结构 分子动力学模型 Exotic structures, Halo, α cluster, Quantum molecular dynamics (QMD)
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