Abstract
The relaxation parameters of the lines of the P, Q, and R branches of the ν1 ammonia ν1 band are calculated in the case of self-broadening. In the case of doublets, the effects of collisional interference of the doublet components have been taken into account. It is shown that the cross-relaxation parameters of the components can reach ~60% of the values of the self-broadening coefficients, which gives rise to the narrowing of the components and indicates that the isolated line approximation is inapplicable. Comparison with experimental data is made. Good agreement for self-broadening coefficients is obtained. In the case of the self-shift coefficients, discrepancies are considerable in both magnitude and sign, and it is impossible to elucidate their reasons without invoking additional experimental data.
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Original Russian Text © M.R. Cherkasov, 2017, published in Optika i Spektroskopiya, 2017, Vol. 122, No. 6, pp. 892–905.
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Cherkasov, M.R. Broadening and collisional interference of lines in the IR spectra of ammonia: Self-broadening in the ν1 band. Opt. Spectrosc. 122, 859–871 (2017). https://doi.org/10.1134/S0030400X17060054
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DOI: https://doi.org/10.1134/S0030400X17060054