A new model for the Schumann-Runge bands of O2

Abstract

A new quantum-mechanical model is presented of photoabsorption and photodissociation in the discrete and continuous Schumann-Runge regions of the molecular oxygen spectrum, based on the coupled-channel Schrödinger-equations method. The ability of the model to predict accurately temperature-dependent photoabsorption cross sections and photodissociation branching ratios is demonstrated, suggesting applications in the areas of atmospheric vacuum-ultraviolet opacity and photochemistry.