Influence of large magnetic fields on fluorescence of gaseous CS2 excited through several V bands

In the present investigation, we examine fluorescence excitation spectra and fluorescence decay profiles for the 11V, 13V, 15V, and 21V bands of gaseous CS2 under magnetic fields of up to 10 T. These experimental results indicate that the magnetic quenching (MQ) of the fluorescence from these bands can be interpreted by the hybrid of the direct and indirect mechanisms. The rotational and vibrational dependence of MQ is obtained from results of fluorescence excitation spectra. At higher fields than 1.5 T, MQ for the K' = 1 band (13V) exceeded that for the corresponding K' = 0 band (15V). From the theoretical analysis of this K' dependence, we interpret this MQ in terms of the direct mechanism. Although the vibrational dependence is not clear, this result may mean that the Zeeman interaction between V and T states is important for the direct mechanism. The dependence of MQ on J' is examined for the P(2), P(4), and P(6) lines in the 15V band. This result shows that the degree of MQ is increased with increasing J', and this trend is consistent with the previous results for other molecules.