Quantum defect orbital study of electronic transitions in Rydberg molecules: ammonium and fluoronium radicals Original Research Article

Oscillator strengths and Einstein emission coefficients for NH4 and H2F Rydberg radicals have been calculated using the quantum defect orbital method. An estimate of the accuracy of this approach has been obtained by a comparison of the results with the data derived from more sophisticated ab initio methods. In several cases, in particular for H2F molecule, predictions of unknown transition probabilities have been given. The method proved to be a reliable and useful tool to estimate transition probabilities between molecular Rydberg states.