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

• 作者: Chuan-Gang Ning Ru-Lin Tang Xiao-Xi Fu Yu-Zhu Lu
• 来源期刊: 中国物理B（英文版）
• 关键词: electron affinity cerium anion slow electron velocity-map imaging cold ion trap
• 年，卷（期）: 2020,（7）
• 页码范围: 313-319
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab90e9

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.