Journal ArticleDOI
Chemical Applications of Metastable Argon Atoms. IV. Excitation and Relaxation of Triplet States of N2
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In this paper, an argon flow system containing about 0.01% of metastable argon atoms (3P2,0) in the absence of other energy carriers is described and characterized.Abstract:
An argon flow system containing about 0.01% of metastable argon atoms (3P2,0) in the absence of other energy carriers is described and characterized. The interaction of these metastable atoms with nitrogen gives radiative transitions of N2 from C(3Πu) → B(3Πg) → A(3Σu+) and finally A(3Σu+) → X(1Σg+). Absolute‐intensity measurements, high‐resolution spectra, and pressure‐dependence data show that independent channels exist for production of C(3Πu) and B(3Πg). Unusual nonequilibrium populations of the rotational levels, the three spin sublevels, and the λ‐doublet levels were found for the N2(C3Πu) state. Possible mechanisms responsible for producing these populations are discussed. Study of the dependence of these populations upon pressure permitted evaluation of collisional relaxation within the various levels of N2(C3Πu). It was shown that rotational relaxation mainly occurs by ΔK = ± 1 with a rate constant of 7.4 × 1013 cm3 mol−1·sec−1. The rate constant for electronic quenching of N2(C3Πu) by argon is l...read more
Citations
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Journal ArticleDOI
Gas temperature determination from rotational lines in non-equilibrium plasmas: a review
TL;DR: In this paper, a detailed analysis of the gas temperature determination from rotational spectra is performed, and a large range of conditions for which non-equilibrium occurs are identified.
Journal ArticleDOI
State‐to‐state N2(A 3Σ+u) energy‐pooling reactions. I. The formation of N2(C 3Πu) and the Herman infrared system
TL;DR: In this paper, the authors studied the formation of N2(C 3 Πu, v = 0−4) and the nitrogen Herman infrared system, v 2,3, in energy pooling reactions between N2 (A 3Σ+u, V 2, v 0−1).
Journal ArticleDOI
A nomenclature for Λ‐doublet levels in rotating linear molecules
Millard H. Alexander,Peter Andresen,Roger Bacis,Richard Bersohn,Franz Josef Comes,Paul J. Dagdigian,Richard N. Dixon,Robert W. Field,George W. Flynn,K.‐H. Gericke,Edward R. Grant,B. J. Howard,J. R. Huber,D. S. King,James L. Kinsey,K. Kleinermanns,Kozo Kuchitsu,A. C. Luntz,A. J. McCaffery,Brigitte Pouilly,Hanna Reisler,Salman Rosenwaks,Erhard W. Rothe,Moshe Shapiro,John P. Simons,R. Vasudev,John R. Wiesenfeld,Curt Wittig,Richard N. Zare +28 more
TL;DR: In this paper, it was proposed that the two doublet levels of linear molecules with nonzero electronic orbital angular momentum be labeled Λ(A')/Λ' with respect to the reflection of the spatial coordinates of the electrons in the plane of rotation.
Journal ArticleDOI
Quenching rate constants for metastable argon, krypton, and xenon atoms by fluorine containing molecules and branching ratios for XeF* and KrF* formation
TL;DR: In this paper, the branching ratio measurements were made via comparison to the XeCl* and KrCl* emission intensities from reaction of Xe(3P2) with Cl2, F2, and OF2.
Journal ArticleDOI
State‐to‐state N2(A 3∑+u) energy pooling reactions. II. The formation and quenching of N2(B 3Πg, v’=1–12)
TL;DR: In this article, the state-to-state excitation of N2(B) was studied in energy pooling reactions between N 2(A∑+u, v'=0,1) molecules and subsequent quenching in collisions with molecular nitrogen, and the excitation rate coefficients were shown to be quite large, 7.7×10−11 cm3molecule−1/s−1 for the pooling of two n2(A, v’=0) molecules, and roughly a factor of three larger for the energy pool
References
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