New line intensity measurements for 12C 2H 2 around 7.7 μm and HITRAN format line list for applications

Abstract

Absolute intensities of 467 lines are measured in 9 bands of the 7.7 μm spectral region of the 12C 2H 2 molecule, with an average accuracy of 5%. For each band, the vibrational transition dipole moment squared and Herman–Wallis coefficients are obtained in order to model the rotational dependence of the transition dipole moment squared. These results are used to calculate a line list for atmospheric or astrophysical applications. Merged in the line list set up in a previous work for the 8 strongest bands around 7.7 μm [5], these new data give now a quasi-exhaustive view of the 12C 2H 2 spectrum in the involved spectral region.