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Absolute Intensities of the Discrete and Continuous Absorption Bands of Oxygen Gas at 1.26 and 1.065 µ and the Radiative Lifetime of the 1Δg State of Oxygen

Badger, Richard M. and Wright, Alan C. and Whitlock, Rodger F. (1965) Absolute Intensities of the Discrete and Continuous Absorption Bands of Oxygen Gas at 1.26 and 1.065 µ and the Radiative Lifetime of the 1Δg State of Oxygen. Journal of Chemical Physics, 43 (12). pp. 4345-4350. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:BADjcp65

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Abstract

Laboratory measurements have been made of the absolute intensities of the discrete-line absorption band at 1.26 µ, and of the continuous bands at 1.26 and 1.065 µ in oxygen gas at pressures up to 4.3 atm. It has been shown that discrete and continuous absorptions are quite independent features, the one being a measure of the intrinsic transition probability in isolated molecules, the other of its enhancement in collision complexes. In the former the lines show significant pressure broadening, but the integral molecular absorption coefficients are constant; in the latter they are proportional to pressure and continuous absorption dominates in the 1.26-µ region at about ½ atm oxygen pressure.The radiative half-life of isolated 1Δg oxygen molecules is estimated to be 45 min, and the effect of gas pressure on the rate of decay has been predicted.


Item Type:Article
Additional Information:Copyright © 1965 American Institute of Physics. Received 24 August 1965. One of us (A.C.W.) gratefully acknowledges support from the National Science Foundation in the form of an undergraduate summer research fellowship. We are greatly indebted to Dr. Oliver R. Wulf, and Dr. Sunney I. Chan for discussions and constructive criticism. Gates and Crellin Laboratories of Chemistry, Contribution No. 3276.
Record Number:CaltechAUTHORS:BADjcp65
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BADjcp65
Alternative URL:http://dx.doi.org/10.1063/1.1696694
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10448
Collection:CaltechAUTHORS
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Deposited On:06 May 2008
Last Modified:26 Dec 2012 10:00

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