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

doi:10.1088/1674-1056/ab90e9

中国物理B ›› 2020, Vol. 29 ›› Issue (7): 73201-073201.doi: 10.1088/1674-1056/ab90e9

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

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

Xiao-Xi Fu(付筱茜), Ru-Lin Tang(唐如麟), Yu-Zhu Lu(陆禹竹), Chuan-Gang Ning(宁传刚)

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

收稿日期:2020-04-07 修回日期:2020-04-29 出版日期:2020-07-05 发布日期:2020-07-05
通讯作者: Chuan-Gang Ning E-mail:ningcg@tsinghua.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91736102 and 11974199) and the National Key R&D Program of China (Grant No. 2018YFA0306504).

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

Xiao-Xi Fu(付筱茜)¹, Ru-Lin Tang(唐如麟)¹, Yu-Zhu Lu(陆禹竹)¹, Chuan-Gang Ning(宁传刚)^1,2

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

Received:2020-04-07 Revised:2020-04-29 Online:2020-07-05 Published:2020-07-05
Contact: Chuan-Gang Ning E-mail:ningcg@tsinghua.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91736102 and 11974199) and the National Key R&D Program of China (Grant No. 2018YFA0306504).

摘要/Abstract

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^- (⁴H_9/2, ⁴I_9/2, ²H_9/2, ²G_9/2, ²G_7/2, ⁴H_13/2, ²F_5/2, and ⁴I_13/2) are observed.

关键词: electron affinity, cerium anion, slow electron velocity-map imaging, cold ion trap

Abstract: 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^- (⁴H_9/2, ⁴I_9/2, ²H_9/2, ²G_9/2, ²G_7/2, ⁴H_13/2, ²F_5/2, and ⁴I_13/2) are observed.

Key words: electron affinity, cerium anion, slow electron velocity-map imaging, cold ion trap

中图分类号: (Ionization potentials, electron affinities)

32.10.Hq

32.80.Gc (Photodetachment of atomic negative ions) 37.10.Rs (Ion cooling) 37.10.Ty (Ion trapping)

付筱茜, 唐如麟, 陆禹竹, 宁传刚. Accurate electron affinity of atomic cerium and excited states of its anion[J]. 中国物理B, 2020, 29(7): 73201-073201.

Xiao-Xi Fu(付筱茜), Ru-Lin Tang(唐如麟), Yu-Zhu Lu(陆禹竹), Chuan-Gang Ning(宁传刚). Accurate electron affinity of atomic cerium and excited states of its anion[J]. Chin. Phys. B, 2020, 29(7): 73201-073201.

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

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

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