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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. doi:10.1063/1.1677339.

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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.

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Flagan, Richard C.0000-0001-5690-770X
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 K. L. Wray of Avco-Everett Research Lab for supplying us with his unpublished measurements of the time to reach peak intensity and the absolute maximum intensity.
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Office of Naval Research (ONR)N00014-67-A-0204-0040
Advanced Research Projects Agency (ARPA)322
Issue or Number:3
Record Number:CaltechAUTHORS:20120802-101330203
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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
Deposited On:02 Aug 2012 18:44
Last Modified:13 Apr 2023 18:59

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