Franck–Condon factors for the B–X system of S2

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Abstract
A frequency‐doubled tunable dye laser has been used to selectively excite individual rotational levels within the vibrational levels υ′=2, and 6–9, of the B 3Σ− u state of S2. Measurements of the intensity in emission of all the (υ,υ″) bands permit determination of the absolute Franck–Condon factors q v′v ″ . Combined with previous studies, this work completes the set of q v′v ″ for bound–bound transitions within the B–X system. A simple pictorial representation of the Franck–Condon factors is presented, and conclusions may be drawn concerning overlap with the B‐state wave functions above the predissociation limit.