Precision calculation of fine structure in helium and Li^+  

作　　者：张佩佩 钟振祥 严宗朝 史庭云 

机构地区：[1]Division of Theoretical and Interdisciplinary Research,State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,and Center for Cold Atom Physics,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Department of Physics,University of New Brunswick

出　　处：《Chinese Physics B》2015年第3期111-117,共7页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2010CB832803)

摘　　要：The fine structure constant α can be extracted from high-precision spectroscopy of the 2^3 P J fine structure splittings in helium and light helium-like ions. In this work, the 2^3 P J fine structure splittings of helium and Li^＋ ion are calculated,including relativistic and QED corrections of order mα^4, mα^4（m/M）, mα^5, mα^5（m/M）, and Douglas–Kroll operators of mα^6 and mα^6（m/M）, which provide an independent verification for the previous calculations performed by Drake [Can.J. Phys. 80 1195（2002）] and by Pachucki and Yerokhin [Phys. Rev. A 79 062516（2009）; Phys. Rev. Lett. 104 070403（2010）; Can. J. Phys. 89 1139（2011）]. The results of the three groups agree with each other.The fine structure constant α can be extracted from high-precision spectroscopy of the 2^3 P J fine structure splittings in helium and light helium-like ions. In this work, the 2^3 P J fine structure splittings of helium and Li^＋ ion are calculated,including relativistic and QED corrections of order mα^4, mα^4（m/M）, mα^5, mα^5（m/M）, and Douglas–Kroll operators of mα^6 and mα^6（m/M）, which provide an independent verification for the previous calculations performed by Drake [Can.J. Phys. 80 1195（2002）] and by Pachucki and Yerokhin [Phys. Rev. A 79 062516（2009）; Phys. Rev. Lett. 104 070403（2010）; Can. J. Phys. 89 1139（2011）]. The results of the three groups agree with each other.

关 键 词：fine structure HELIUM Li^＋ ion QED theory 

分 类 号：O562[理学—原子与分子物理]