Inversion of the populations of vibrational levels of anharmonic molecules under the influence of optical and thermal pulses

S. A. Losev, V. N. Makarov


Abstract: An investigation is made of nonequilibrium processes in a system of diatomic anharmonic molecules subjected to optical and thermal pulses. Numerical integration of a system of rate equations for the populations is used to study the evolution of the distribution function to its quasisteady state. Passage of a shock wave through a gas of such molecules establishes a new quasisteady state corresponding to the translational temperature behind the shock wave. The function describing the distribution of the populations between the vibrational levels passes through a series of forms corresponding to the establishment of an absolute inversion.

UDC: 621.373.826

PACS: 33.15.Mt, 33.80.Be, 33.80.Rv, 42.55.Lt

Received: 03.08.1984

 English version: Soviet Journal of Quantum Electronics, 1985, 15:8, 1072–1074

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