Laser bolometric detection of long-lived and predissociating electronically excited states

Abstract Laser bolometric detection in molecular beams is used for high-resolution spectroscopy of the long-lived electronically excited A 3 Π 1 , state of ICl and hyperfine predissociation of the B 3 Π o u + state of I 2 . In the former case all hyperfine components of the Q2 19-0 line are resolved. In the latter case the predissociation constants for v' = 14, 17 and 18 are determined.