| Abstract: | The vibrational kinetics of molecules simulated by anharmonic oscillators is developed under essentially nonequilibrium conditions. Analytic expressions are obtained for the vibrational distribution function, the relaxation time, and the dependence of the vibrational energy on the pump power; the limiting capacity of the energy reservoir of the anharmonic molecules is estimated. Vibrational kinetics is investigated in mixtures and a redistribution of the vibrational energy among the modes is observed as a function of the component concentration. The singularities of vibrational relaxation in liquids and molecular crystals, due to collective interactions, are studied. A number of concrete applications are considered: the rate of nonequilibrium dissociation is calculated, an analytic model is developed for the CO laser, isotope separation in chemical reactions of vibrationally excited molecules is investigated, and a new type of lasers based on intramolecular transitions in liquids and molecular crystals is proposed.The article represents the contents of a dissertation submitted for the degree of Candidate of Physicomathematical Sciences. Guidance chairmen-Doctor of physicomathematical sciences A. L. Shelepin and Candidate of physicomathematical sciences B. F. Gordiets. Defended 27 October 1975 at the P. N. Lebedev Physics Institute of the Academy of Sciences of the USSR.Translated from Trudy Ordena Lenina Fizicheskogo Instituta im. P. N. Lebedeva, Akademii Nauk SSSR, Vol. 107, pp. 3–67, 1979. |
