Abstract
The well-known model of molecular rotation in gases and liquids - Gordon's model of J diffusion - is developed in application to the calculation of the spin-rotational absorption spectrum of gaseous oxygen in a wide range of frequencies of the orientational magnetic polarization: 0 5 v ~ i00 cm -l. The analysis of the model is performed based on the memory-function formalism. The computational results agree well with the experimental data on the absorption of microwave radiation in oxygen at pressures ranging from ~0.i up to ~50 atm. The results are also compared with other models. Oxygen is one of the main components of the earth's atmosphere that strongly absorbs microwave radiation. Absorption in oxygen is due to the interaction of the permanent dipole moment of the 02 molecular with the electromagnetic field. The spin-rotational absorption spectrum of oxygen can be conditionally divided into
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