Experimental measurement of collision broadening of vibrational-rotational spectral lines 12C16O2 and 13C16O2 in the 4860–4880 cm−1 region by diode laser absorption spectroscopy

The experimental measurement of the R(18), R(20), R(22), R(24), R(26), R(28), R(30), R(34), R(36) absorption lines collision broadening for the 12C16O2 molecule vibrational band 20013–00001 and P(10), P(12), P(14), P(16), P(18), P(20), P(22) absorption lines for the 13C16O2 molecule 20012–00001 vibrational band have been reported in this paper. The research has been first carried out by the diode laser absorption spectroscopy method using a single-frequency diode laser emitting in the 4860–4880 cm−1 region. The dependences of the absorption constants and cross-sections of these lines on the 13C16O2 and 12C16O2 molecules mixture concentrations in the ratio of 1:140 have been studied. The obtained results have been compared with the HITRAN spectroscopic database data.