Влияние неопределенности значений вероятностей спонтанного излучения на температурное поведение коэффициентов ударного самоуширения спектральных линий молекул CO-=SUB=-2-=/SUB=-

Abstract

The influence of the deviation of the spontaneous radiation probability of the spectral lines of CO2 A on the temperature dependence of the collisional self-broadened coefficients γ in solving the inverse problem of joint determination of A and γ from the array of absorption coefficients is studied. The study was carried out for two cases: 1) A=0.2022 s-1 (HITRAN2012); 2) the values of A were obtained by minimizing the sum of weighted squares of the absorption coefficients differences. It was found that in the temperature range of 300-700 K, when the absorption coefficients are measured with accuracy 0.05∙αmin, the deviation of the functions γ(T) does not exceed 5%. There is no causal relationship between the parameters γ and A. The method of least squares allows us to correctly calculate the temperature dependences of the collisional self-broadened coefficients of the CO2 lines γ(T).