Accurate Electron Affinity of Iron and Fine Structures of Negative Iron ions

被引：29

作者：

Chen, Xiaolin ^{[1
]}

Luo, Zhihong ^{[1
]}

Li, Jiaming ^{[1
]}

Ning, Chuangang ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 10084, Peoples R China

[2] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

中国国家自然科学基金;

关键词：

HIGH-RESOLUTION PHOTODETACHMENT; BINDING-ENERGIES; EXCITED-STATES; TRANSITION; FE; SPECTROSCOPY; CR; CO;

D O I：

10.1038/srep24996

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Ionization potential (IP) is defined as the amount of energy required to remove the most loosely bound electron of an atom, while electron affinity (EA) is defined as the amount of energy released when an electron is attached to a neutral atom. Both IP and EA are critical for understanding chemical properties of an element. In contrast to accurate IPs and structures of neutral atoms, EAs and structures of negative ions are relatively unexplored, especially for the transition metal anions. Here, we report the accurate EA value of Fe and fine structures of Fe-using the slow electron velocity imaging method. These measurements yield a very accurate EA value of Fe, 1235.93(28) cm(-1) or 153.236(34) meV. The fine structures of Fe-were also successfully resolved. The present work provides a reliable benchmark for theoretical calculations, and also paves the way for improving the EA measurements of other transition metal atoms to the sub cm(-1) accuracy.

引用

页数：6

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