Diode laser spectroscopy of the ν3 band region of four isotopic forms of CS2

The diole laser spectrum of a natural sample of the linear molecule, CS₂, has been measured in the region 1450–1550 cm^?1. An absolute frequency calibration of approximately 0.001 cm^?1 was achieved by measuring CS₂ absorption lines relative to those of H₂O and HDO and using the absolute wave numbers of Guelachvili [J. Opt. Soc. Amer., 73, 137–150 (1983)]. Band constants were determined for the following: C³²S₂; (0, 0, 1) ← (0, 0, 0), (0, 1¹, 1) ← (0, 1¹, 0), (0, 2^0,2, 1) ← (0, 2^0,2, 0), (1, 0, 1) ← (1, 0, 0); ³⁴SC³²S; (0, 0, 1) ← (0, 0, 0): ³³SC³²S; (0, 0, 1) ← (0, 0, 0): ¹³C³²S₂; (0, 0, 1) ← (0, 0, 0).