Laser photoelectron spectrometry of FeO−: Electron affinity, electronic state separations, and ground state vibrations of iron oxide, and a new ground state assignment

Publisher Website
Google Scholar
Abstract
The photoelectron spectrum of FeO− ions, obtained with 2.54 eV Ari i irradiation, consists of a well resolved series of vibrational transitions from the ground electronic state of the negative ion to two low‐lying electronic states of FeO. Analysis of this spectrum gives the electron affinity of FeO (1.492±0.020 eV) and the vibrational frequency of the negative ion (740±60 cm−1). The vibrational frequency of the ground state of FeO is 970±60 cm−1; the term energy T0 of the first excited state of FeO is 3990±100 cm−1. The FeO vibrational frequency shows definitively that the accepted ordering of FeO states is incorrect, and that the previously assumed ground state must in fact be an excited state. Earlier spectroscopic studies of FeO are re‐examined, and a new state ordering, consistent with all experimental data, is proposed.

This publication has 18 references indexed in Scilit: