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1972•Journal of Physics B Atomic and Molecular PhysicsRequires access

A comment on the vibrational relaxation of anharmonic oscillators

George E. Caledonia

Open publisher page 1 citations

Abstract

Recent calculations by Bray (see abstr. 1060 of 1971) describing the vibrational relaxation of anharmonic oscillators were presented in a format which is shown to be misleading when used to predict the behaviour of the vibrational 'temperature' between the lowest levels. These results are reinterpreted in terms of this low level 'temperature' and an approximate analytic expression is presented for use in expansion flows where collisional deactivation is unimportant. Good agreement is found between this expression and the numerical results.

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What this paper is about

Recent calculations by Bray (see abstr. 1060 of 1971) describing the vibrational relaxation of anharmonic oscillators were presented in a format which is shown to be misleading when used to predict the behaviour of the vibrational 'temperature' between the lowest levels. These results are reinterpreted in terms of this low level 'temperature' and an approximate analytic expression is presented for use in expansion flows where collisional deactivation is unimportant. Good agreement is found between this expression and the numerical results.

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Available abstract

Recent calculations by Bray (see abstr. 1060 of 1971) describing the vibrational relaxation of anharmonic oscillators were presented in a format which is shown to be misleading when used to predict the behaviour of the vibrational 'temperature' between the lowest levels. These results are reinterpreted in terms of this low level 'temperature' and an approximate analytic expression is presented for use in expansion flows where collisional deactivation is unimportant. Good agreement is found between this expression and the numerical results.

Key concepts: Anharmonicity, Relaxation (psychology), Vibrational energy relaxation, Expression (computer science), Relaxation oscillator, Statistical physics, Physics, Thermodynamics

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