Collisional electronic quenching of NO A sup 2. Sigma. sup + by N sub 2 from 300 to 4500 K

We report rate coefficients for electronic quenching of NO {ital A} {sup 2}{Sigma}{sup +} {ital v}{prime}=0 by N{sub 2} measured at room temperature and at high temperatures behind reproducible shock waves. The quenching cross section increases from 0.007 A{sup 2} at 300 K to 7 A{sup 2} at 4500 K, a...

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Bibliographic Details
Published in:The Journal of chemical physics 1992-12, Vol.97:11
Main Authors: Thoman, J.W. Jr, Gray, J.A., Durant, J.L. Jr, Paul, P.H.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
CHALCOGENIDES
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUORESCENCE
LUMINESCENCE
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITRIC OXIDE
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RELAXATION
RESOLUTION
SHOCK WAVES
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
TEMPERATURE RANGE OVER 4000 K
TIME RESOLUTION
TIMING PROPERTIES 664300 > Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
VIBRATIONAL STATES
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Summary:We report rate coefficients for electronic quenching of NO {ital A} {sup 2}{Sigma}{sup +} {ital v}{prime}=0 by N{sub 2} measured at room temperature and at high temperatures behind reproducible shock waves. The quenching cross section increases from 0.007 A{sup 2} at 300 K to 7 A{sup 2} at 4500 K, and the temperature dependence in the range 300--2300 K is best understood using a charge-transfer (harpoon) collision model. We also record dispersed fluorescence spectra and time-resolved fluorescence from both the directly pumped level ({ital v}{prime}=0) and a collisionally populated level ({ital v}{prime}=1); from these results we obtain rate coefficients for vibrational energy transfer in NO ({ital A}) and electronic quenching of {ital v}{prime}=1 at 1900 K.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.463437