On the Theory of Accidental Predissociation

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Abstract
Applying the results of quantum electrodynamics we investigate the case of perturbation between two discrete and one continuous term series. Even though no interaction between the first discrete and the continuous states exists, a considerable predissociation may arise for some spectrum lines in case of coincidence or close proximity between the levels of the two discrete terms belonging to the same rotational quantum number. The predissociation occurring in the first discrete term is caused by the second. This phenomenon is called accidental predissociation. Our results are in excellent agreement with the results obtained in the γ‐bands of NO molecule by Schmid and Gerö.

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