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

被引：4
|
作者：
Fu, Xiao-Xi [1 ]
Tang, Ru-Lin [1 ]
Lu, Yu-Zhu [1 ]
Ning, Chuan-Gang [1 ,2 ]
机构：
[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
[2] Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China
来源：
CHINESE PHYSICS B | 2020年 / 29卷 / 07期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
electron affinity; cerium anion; slow electron velocity-map imaging; cold ion trap; IONS;
D O I：
10.1088/1674-1056/ab90e9
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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- (H-4(9/2), I-4(9/2), H-2(9/2), (2)G(9/2), (2)G(7/2), H-4(13/2), F-2(5/2), and I-4(13/2)) are observed.
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收藏
页数：6
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