UV absorption spectrum and absorption cross sections of COF₂ at 296 K in the range 200 – 230 nm

Abstract

The UV spectrum and the absorption cross sections of carbonyl fluoride (COF 2 ) have been measured in the wavelength range 200 – 230 nm at 296 K with a resolution of 0.03 nm by diode array spectroscopy. Preliminary results of the determination of the quantum yield of COF 2 at 193 nm and 296 K are presented. The new absorption cross sections and the new estimate of the quantum yield were used to calculate photodissociation rate constants at solar zenith angles ranging from 0° to 86° as a function of height (0 – 55 km).