The Rovibrational Intensities of the (4001) ← (0000) Pentad Absorption Bands of12C16O2between 7284 and 7921 cm−1

Abstract Absolute line intensities and Herman–Wallis type intensity parameters of 12 C 16 O 2 are experimentally measured for the first time for the (40 0 1) IV ← (00 0 0) band at 7460 cm −1 and the (40 0 1) I ← (00 0 0) band at 7921 cm −1 . The rotationless band strengths at 296 K are respectively[formula]and[formula]In addition, previous measurements on the (40 0 1) II ← (00 0 0) and (40 0 1) III ← (00 0 0) bands have been reanalyzed to be consistent with definitions of Herman–Wallis parameters currently in use.