Absolute intensity measurements in the ν3 band of carbon disulphide

The aim of this paper is to determine with accuracy the band strength of the strong nu(3) fundamental band of carbon disulphide CS2. By diode-laser spectroscopy, we have measured line by line the intensities for the (CS2)-C-12-S-32 form by the equivalent width method and by the line profile fitting method. To confirm our results, we have also measured 30 lines for the (CS2)-C-13-S-32 isotopic species using a sample Of CS2 in natural abundance. We have obtained for the band strength S-v(o) = 1417 cm(-2) atm(-1) at 296 K and this value is in good agreement with the values from the literature.