ASSESSMENT OF SPONTANEOUS LIFETIMES IN CO2 USING AN HF LASER AS RADIATION SOURCE

We have experimentally determined the absorption coefficient of CO2 using the 3P(2) line emitted by an HF laser, as a function of the gas temperature up to 700-degrees-K, while keeping its pressure as a parameter. The measurements were compared with a theoretical model for the absorption which takes into account the high monochromaticy of the source and the detuning of the HF laser lines with respect to the CO2 absorption lines central wavelengths. A set of values was thus obtained for the A Einstein coefficient of the transitions given by (0 0(0) 0) --> (0 2(0) 1; 1 1(1) 1)(I,II), (10(0) 0; 0 2(0) 0)(I,II)--> (0 4(0) 1; 1 2(0) 1; 2 0(0) 1)(I,II,III) and (01(1) 0) --> (1 1(1) 1; 0 3(1) 1)(I,II), in such a way that said values allowed, the coincidence between the experimental results and those predicted by the theoretical model.