超Fm原子核转动谱的系统研究

原子核物理评论 , 2013, 30(3): 268-277. doi: 10.11804/NuclPhysRev.30.03.268

超Fm原子核转动谱的系统研究

张振华 ^1, , 温凯 ^2, , 贺晓涛 ^3, , 曾谨言 ^4, , 赵恩广 ^5, , 周善贵 ^6,

1.核物理与核技术国家重点实验室,北京大学物理学院,北京 100871

2.理论物理国家重点实验室,中国科学院理论物理研究所,北京 100190

3.南京航空航天大学材料科学与技术学院,江苏南京,210016

4.北京大学物理学院,北京,100871

5.理论物理国家重点实验室,中国科学院理论物理研究所,北京 100190;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

6.理论物理国家重点实验室,中国科学院理论物理研究所,北京 100190;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

基金项目: 中国科学院知识创新工程重要方向项目(KJCX2-EW-N01,KJCX2-YW-N32) 国家重点基础研究发展计划项目(973计划)(2013CB834400) 国家自然科学基金资助项目(10975100,10979066,11121403,11175252,11120101005,11275098,11275248) National Natural Science Foundation of China(10975100,10979066,11121403,11175252,11120101005,11275098,11275248) National Basic Research Program of China(973 Program)(2013CB834400) Knowledge Innovation Project of Chinese Academy of Sciences(KJCX2-EW-N01,KJCX2-YW-N32)

关键词：超Fm原子核 , 转动谱 , ab公式 , 粒子数守恒方法 , 推转壳模型

Systematic Investigation on Spectroscopy of Transfermium Nuclei

Keywords： transfermium nuclei , rotational band , ab formula , particle number conserving method , cranked shell model

简要介绍超Fm原子核谱学的实验和理论研究进展,并综述本研究组近期在超Fm原子核谱学方面的一些理论研究工作,包括:利用转动谱公式系统研究了超Fm核区偶偶核与奇A核的转动谱.结果表明,在二参数公式中,相较于AB公式和Harris公式,ab公式能够更好地描述偶偶核基态转动带;通过拟合超Fm核区奇A核的单粒子能级,提出了一组轨道角动量依赖的Nilsson新参数;利用粒子数守恒方法处理对关联,基于推转壳模型,系统研究了超Fm原子核转动谱,计算得到的转动惯量、角动量顺排等与实验符合;通过分析费米面附近Nilsson能级的占据几率以及各条轨道对角动量顺排的贡献,解释了这个质量区原子核的转动带产生回弯(上弯)的原因.进一步,利用这组新Nilsson参数,研究了超重核的单粒子能级结构以及微观壳修正能量.计算表明,这组新Nilsson参数预言的超重岛中心为Z=120和N=182.

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