Measurement of Electron Affinity of Atomic Lutetium via the Cryo-SEVI Method

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

作者机构：Department of Physics State Key Laboratory of Low-Dimensional Quantum Physics Tsinghua University Beijing 10084 China Collaborative Innovation Center of Quantum Matter Beijing 100084 China 

出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)

年 卷 期：2019年第32卷第2期

页      面：187-192,I0002页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (No.91736102) the National Key R&D program of China (No.2018YFA0306504) 

主　　题：Electron affinity Cryogenically controlled ion trap Lutetium anion 

摘      要：Electron affinities (EAs) of most lanthanide elements still remain unknown due to their relatively low EA values. In the present work, the cryogenically controlled ion trap is used for accumulating atomic lutetium anion Lu^-, which makes the measurement of electron affinity of lutetium become practicable. The high-resolution photoelectron spectra of Lu^- are obtained via the slow-electron velocity-map imaging method. The electron affinity of Lu is determined to be 1926.2(50) cm^-1 or 0.23882(62) eV. In addition, two excited states of Lu^- are observed.