Rotational Band Contour Studies of Single Vibronic Levels in Jet-Cooled trans-Stilbene

摘要: The rotational band contours of approximately 40 vibrational levels in the first excited singlet state (S_1) supersonic jet-cooled stilbene are obtained and analyzed by use computer simulations. No substantial differences found contour shapes different levels, which is attributed to low symmetry and/or extensive torsional motion. Approximately 35 studied frequency resolving their emission, but no dependence shape on detection conditions (specific mode detected, relaxed vs. unrelaxed emission) observed. selective resolve overlapping states discussed qualitatively quantitatively, with excellent agreement between experiment theory. Finally, high-resolution (0.05 cm^(-1)) maps two known regions S_1 exhibiting evidence dissipative intramolecular redistribution (IVR) presented clarify level structure involved.