A simple formulation of the CH 2 O photolysis quantum yields

  title={A simple formulation of the CH 2 O photolysis quantum yields},
  author={E.-P. R{\"o}th and D. H. Ehhalt},
New expressions for the wavelength-dependent photolysis quantum yields of CH2O, 8j , are presented. They are based on combinations of functions of the type Ai/(1+exp[−(1/λ−1/λ0i)/bi]). The parametersAi , bi , and λ0i which have a physical meaning, are obtained by fits to the measured 8j data available from literature. The altitude dependence of the photolysis frequencies resulting from the new quantum yield expressions are compared to those derived from the 8j recommended by JPL and IUPAC. 

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