Photodissociation of CN

Here, we report results for the electronic transitions ^2^{Sigma}^+^(4)<-X^2^{Sigma}^+^, ^2^{Sigma}^+^(5)<-X^2^{Sigma}^+^, ^2^{Pi}(4)<-X^2^{Sigma}^+^, and ^2^{Pi}(5)<-X^2^{Sigma}^+^. Partial cross sections for transitions from all 5581 rovibrational levels theoretically obtained for the ground electronic state X^2^{Sigma}^+^ were computed for a wavelength range that extends from 500{AA} to the dissociation threshold for each particular rovibrational state.

Cross sections assuming a thermal Boltzmann distribution of rovibrational levels for gas temperatures between 500 to 5000 K are also obtained. Applications of the results to ultraviolet irradiated environments are discussed.