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Quantum Theory

Quantum Theory BY]. W. LINNETT AND P. G. DICKENS Inorganic Chemistry Laboratory, University of Oxford, England energy This article is divided into two main parts, one dealing with transfers of between vibrational and translational degrees of freedom, and the other with valency and the electronic structure of molecules. VIBRATIONAL ENERGY TRANSFER IN GASES A better understanding of the factors influencing the ease of transfer of energy from vibrational degrees of freedom to translational has emerged in the last few years, due both to the steady accumulation of experimental data and to the appearance of an improved quantum mechanical method of cal­ culating approximate deactivation probabilities [Slawsky, Schwartz & Herz­ feld (1); Takayanagi (la)]. As has long been known, vibrational to translational energy transfer is an inefficient process. Consequently, during a rapid compressi on of a gas, as for example in a high frequency sound field, vibrati onal degrees of freedom (and in some cases rotational degrees) are unable to adjust themselves im­ mediately to the temperature of the translational degrees. There is a lack of equipartition of energy between internal (vibrational) and external (trans­ lational) degrees, which can be represented in a formal manner by a relaxa­ tion equation (2, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Physical Chemistry Annual Reviews

Quantum Theory

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Publisher
Annual Reviews
Copyright
Copyright 1957 Annual Reviews. All rights reserved
Subject
Review Articles
ISSN
0066-426X
eISSN
1545-1593
DOI
10.1146/annurev.pc.08.100157.001103
Publisher site
See Article on Publisher Site

Abstract

BY]. W. LINNETT AND P. G. DICKENS Inorganic Chemistry Laboratory, University of Oxford, England energy This article is divided into two main parts, one dealing with transfers of between vibrational and translational degrees of freedom, and the other with valency and the electronic structure of molecules. VIBRATIONAL ENERGY TRANSFER IN GASES A better understanding of the factors influencing the ease of transfer of energy from vibrational degrees of freedom to translational has emerged in the last few years, due both to the steady accumulation of experimental data and to the appearance of an improved quantum mechanical method of cal­ culating approximate deactivation probabilities [Slawsky, Schwartz & Herz­ feld (1); Takayanagi (la)]. As has long been known, vibrational to translational energy transfer is an inefficient process. Consequently, during a rapid compressi on of a gas, as for example in a high frequency sound field, vibrati onal degrees of freedom (and in some cases rotational degrees) are unable to adjust themselves im­ mediately to the temperature of the translational degrees. There is a lack of equipartition of energy between internal (vibrational) and external (trans­ lational) degrees, which can be represented in a formal manner by a relaxa­ tion equation (2,

Journal

Annual Review of Physical Chemistry – Annual Reviews

Published: Oct 1, 1957

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