Theory of pressure-induced vibrational and rotational absorption of diatomic molecules at high temperatures |
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Authors: | RW Patch |
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Institution: | Lewis Research Center, Cleveland, Ohio 44135, USA |
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Abstract: | A derivation is given for the integrated absorption coefficient of pressure-induced pure rotational and vibrational transitions in binary collisions of homonuclear diatomic molecules of the same chemical species. The previously neglected effects of excited vibrational states, mechanical anharmonicity, and vibration-rotation interaction are taken into account to obtain more accurate absorption coefficients at high temperatures. In the region of the fundamental wave number the excited vibrational states make more of a contribution to the absorption than their relative population would lead one to expect. |
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