The visible absorption spectrum of 12C2 H2 III. The region 14500-17000 cm-1

The absorption spectrum of 12C2 H2 has been recorded at high resolution by intracavity laser absorption spectroscopy between 14 500 cm-1 and 17 000 cm-1. Among the 32 bands which have been rotationally analysed 15 are newly observed, and improved rovibrational parameters are obtained for the others. The new resulting set of 26 vibrational levels is assigned by extrapolating the cluster model built from lower energy data (Abbouti Temsamani, M., and Herman, M., 1995, J. chem. Phys., 102, 6371) which allows vibrational energies and Bv rotational constants to be predicted. Intensity features are also discussed.