Experimental observation of the vibration-rotation radiation curves of 12C16O2 and 13C16O2 absorption constants ranging from 4860 to 4880 sm-1 by the tunable diode laser absorption spectroscopy method

We report the experimental observation of the absorption constant values of (CO2)-C-12-O-16 and (CO2)-C-13-O-16 using the tunable diode laser absorption spectroscopy method ranging from 4860 to 4880 sm(-1) within the pressure limits of 8-240 mbar for the absorption curves (lines) R(18), R(20), R(22), R(24), R(26), R(28), R(30), R(32), R(34) and R(36) of the 20013-00001 molecule (CO2)-C-12-O-16 vibration band, and within the pressure limits of 0.06-1.7 mbar for the absorption curves P(10), P(12), P(14), P(16), P(18), P(20) and P(22) of the 20012-00001 molecule (CO2)-C-13-O-16 vibration band. In the work, as a mixture under analysis, a mixture of the isotopes (CO2)-C-13-O-16 and (CO2)-C-12-O-16 at the ratio of 1:140 was used. The results have been compared with the data of the HITRAN spectroscopic database.