Optical-IR double resonance effect for single rotational lines of the 000 vibrational transition in H2CS

Optical-IR double resonance spectrum of the a3A2 triplet levels coupled by intramolecular interactions to the rotational levels of the A1A2 singlet state was measured for H2CS excited to a single rotational level of the vibrationless state. The spectrum was recorded for the J′=4, K′a=1, K′c=3 (413) level. The IR field influence on the fluorescence decay of H2CS excited to the level discussed was also investigated. Theoretical model was used to interpret the results obtained.