Accurate electron affinity of atomic cerium and excited states of its anion  

作　　者：Xiao-Xi Fu Ru-Lin Tang Yu-Zhu Lu Chuan-Gang Ning 付筱茜;唐如麟;陆禹竹;宁传刚(Department of Physics,State Key Laboratory of Low-Dimensional Quantum Physics,Tsinghua University,Beijing 100084,China;Collaborative Innovation Center of Quantum Matter,Beijing 100084,China)

机构地区：[1]Department of Physics,State Key Laboratory of Low-Dimensional Quantum Physics,Tsinghua University,Beijing 100084,China [2]Collaborative Innovation Center of Quantum Matter,Beijing 100084,China

出　　处：《Chinese Physics B》2020年第7期275-280,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.91736102 and 11974199);the National Key R&D Program of China(Grant No.2018YFA0306504).

摘　　要：Electron affinities(EA)of most lanthanide elements still remain unknown owing to their relatively lower EA values and the fairly complicated electronic structures.In the present work,we report the high-resolution photoelectron spectra of atomic cerium anion Ce−using the slow electron velocity-map imaging method in combination with a cold ion trap.The electron affinity of Ce is determined to be 4840.62(21)cm^-1 or 0.600160(26)eV.Moreover,several excited states of Ce(^4H9/2,^4I9/2,^2H9/2,^2G9/2,^2G7/2,^4H13/2,^2F5/2,and ^4I13/2)are observed.

关 键 词：electron affinity cerium anion slow electron velocity-map imaging cold ion trap 

分 类 号：O562[理学—原子与分子物理]