The absorption spectrum of 12C2H2 between 12800 and 18500cm−1

The absorption spectrum of 12C2H2 has been recorded at high resolution, between 12 800 and 18 500 cm−1, by Fourier transform spectroscopy and intracavity laser absorption spectroscopy. The observation of 23 new vibrational levels is reported. These new data are gathered with all vibrational levels previously reported in the literature from absorption data, above 12100 cm−1. The resulting set of 82 levels is assigned by extrapolating the cluster model developed at lower energies (Abbouti Temsamani, M., and Herman, M., 1995, J. chem. Phys., 102, 6371).