Photoion and photoelectron spectroscopy of CO and N2

Abstract

Dissociative photoionization processes in CO and N₂ have been studied via photoion and photoelectron spectroscopy. Kinetic energy spectra of both the ions and electrons formed in CO and N₂ have been recorded with a calibrated energy analyzer at incident wavelengths of 584, 462, and 304 Å. The 304 Å spectra are correlated in energy and intensity to deduce dissociation products. For CO, the ²Σ⁺ state of CO⁺ formed by removing a σ2s electron dissociates to the products C⁺ (2p ²P⁰) and O (3s′ ³D⁰). The N₂ ion and electron spectra at 304 Å both contain evidence for dissociative transitions involving the D ²Πg state of N₂⁺. Energetic N⁺ ions produced upon removal of a σ_g2s electron are best explained by a dissociation limit of N⁺ (2p^{3 3}P⁰) and N (2p^{3 4}S⁰).