Photoelectron Spectra of the Halogens and the Hydrogen Halides

Abstract
A spherical‐grid photoelectron spectrometer has been used to measure the ionization potentials of HF, HCl, HBr, HI, F2, Cl2, Br2, and I2. The relative transition probabilities to several of the ionic states are given. There is evidence that the 2Σ+ ionic states in HI+, Cl2+, Br2+, and I2+ are unstable.