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

2016/05/03 by Xiaolin Chen, Zhihong Luo, Jiaming Li +1 · 8 citations
Physics and Astronomy · Materials Science · Chemistry · #X-ray Spectroscopy and Fluorescence Analysis #Electron and X-Ray Spectroscopy Techniques #Advanced Chemical Physics Studies #Electron affinity (data page) #Ion #Electron #Atom (system on chip) #Ionization #Ionization energy #Transition metal #Materials science #Atomic physics #Metal #Metal ions in aqueous solution #Work (physics) #Chemistry #Yield (engineering) #Energetic neutral atom #Chemical physics #Molecule #Physics #Computer science

paper · pdf · doi:10.1038/srep24996

openalex publication_date 2016/05/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23

Abstract

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.

Citations

• Binding energies in atomic negative ions
• Atomic negative ions: structure, dynamics and collisions
• Atomic and Molecular Electron Affinities: Photoelectron Experiments and Theoretical Computations
• Direct experimental observation of weakly-bound character of the attached electron in europium anion
• Precision measurement of the electron affinity of niobium
• Binding Energies in Atomic Negative Ions: III
• CODATA recommended values of the fundamental physical constants: 2018

Cited by

• Electron Affinities of Atoms and Structures of Atomic Negative Ions
• Accurate electron affinity of Ti and fine structures of its anions
• Accurate electron affinity of Ga and fine structures of its anions
• Accurate electron affinity of V and fine-structure splittings of V− via slow-electron velocity-map imaging
• Precision measurement of electron affinity of Zr and fine structures of its negative ions
• Measurement of electron affinity of atomic lutetium via the cryo-SEVI Method
• Accurate electron affinity of Co and fine-structure splittings ofCo−via slow-electron velocity-map imaging
• Electron affinity (data page) [wikipedia]