Accurate electron affinity of atomic cerium and excited states of its anionProject 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)

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-m...

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Bibliographic Details
Published inChinese physics B Vol. 29; no. 7
Main Authors Fu, Xiao-Xi, Tang, Ru-Lin, Lu, Yu-Zhu, Ning, Chuan-Gang
Format Journal Article
LanguageEnglish
Published Chinese Physical Society and IOP Publishing Ltd 01.06.2020
Subjects
cerium anion
cold ion trap
electron affinity
slow electron velocity-map imaging
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Summary: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.
ISSN:1674-1056
DOI:10.1088/1674-1056/ab90e9