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Excitation Mechanisms of the Nitrogen First‐Positive and First‐Negative Radiation at High Temperature

Flagan, Richard C. and Appleton, John P. (1972) Excitation Mechanisms of the Nitrogen First‐Positive and First‐Negative Radiation at High Temperature. Journal of Chemical Physics, 56 (3). pp. 1163-1173. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:20120802-101330203

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Abstract

The kinetic mechanisms responsible for the excitation of the first-positive and first-negative emission of nitrogen have been investigated in a re-examination of previously reported shock-tube measurements of the nonequilibrium radiation for these systems. The rate coefficients of the collisional quenching reactions, N_2(A^(3)Σ^(+)_u)(^(k^(N)_(-2))⇒) N_2(X^(1)Σ^(+)_g) + N(^(4)S) and N^(+)_2(B^(2)Σ^(+)_u) + N_2(X^(1)Σ^(+)_g)(^(k^(N)_(q))⇒) N^(+)_2(X^(2)Σ^(+)_g) or N^(+)_2(A(^(2)II_u)+N_2(X^(1)Σ^(+)_g) were found to be given by the empirical expressions, k_(2^(N))=5.1x10^(-3)T^(-2.23) cm^3 sec^(-1) and k_(q^(N_2))=1.9x10^(-2)T^(-2.33)cm^3 sec^(-1), respectively, over the approximate temperature range 6000-14 000°K.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1677339DOIUNSPECIFIED
http://jcp.aip.org/resource/1/jcpsa6/v56/i3/p1163_s1PublisherUNSPECIFIED
Additional Information:© 1972 The American Institute of Physics. Received 13 May 1971. This research was supported by the Advanced Research Projects Agency of the Department of Defense and monitored by the Office of Naval Research under Contract No. N00014- 67-A-0204-0040 and ARPA Order No. 322. We are grateful to Dr. K. L. Wray of Avco-Everett Research Lab for supplying us with his unpublished measurements of the time to reach peak intensity and the absolute maximum intensity.
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Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-67-A-0204-0040
Advanced Research Projects Agency (ARPA)322
Record Number:CaltechAUTHORS:20120802-101330203
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120802-101330203
Official Citation:Excitation Mechanisms of the Nitrogen Frist-Positive and First-Negative Radiation at High Temperature Richard C. Flagan and John P. Appleton, J. Chem. Phys. 56, 1163 (1972), DOI:10.1063/1.1677339
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32876
Collection:CaltechAUTHORS
Deposited By: Aucoeur Ngo
Deposited On:02 Aug 2012 18:44
Last Modified:26 Dec 2012 15:48

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