A simple formulation of the CH2O photolysis quantum yields

摘要

New expressions for the wavelength-dependent photolysis quantum yields ofCHO, Φ, are presented. They are based on combinations offunctions of the type /(1+exp[−(1/λ − 1/λ)/]).The parameters , , and λ which have a physicalmeaning, are obtained by fits to the measured Φ data availablefrom literature. The altitude dependence of the photolysis frequenciesresulting from the new quantum yield expressions are compared to thosederived from the Φ recommended by JPL and IUPAC.