Homogeneous linewidths of single rotational lines in the ''channel three'' region of C6H6

E. Riedle, H. J. Neusser
1984 Journal of Chemical Physics  
Homogeneous linewidths of single rotationallines have been measured in the "channel three" region of C 6 H 6 • The necessary spectral resolution of about 5 MHz and the high sensitivity were achieved by Doppler-free two-photon spectroscopy within an external cavity setup. Linewidths produced by intramolecular relaxation were found to increase strongly with increasing J for K = 0 and constant vibrational energy Eexcess = 3412 cm-I • This result together with the investigated structure in the
more » ... ructure in the highly resolved spectrum ofthe 1461~ band is a strong indication that Coriolis coupling plays an important role in the intramolecular vibrational redistribution process. 4686
doi:10.1063/1.446533 fatcat:ocbgiu2bi5a5tnqapm6gydepfe