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

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.463437· OSTI ID:7029043

Thoman, Jr, J W ^[1]; Gray, J A; Durant, Jr, J L; Paul, P H ^[2]

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1. Chemistry Department, Williams College, Williamstown, Massachusetts 01267 (United States)
2. Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551 (United States)

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.

• OSTI ID: 7029043
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 97:11; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 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
VIBRATIONAL STATES