Collisional electronic quenching of NO A 2Σ+ by N2 from 300 to 4500 K
- 1 December 1992
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 97 (11) , 8156-8163
- https://doi.org/10.1063/1.463437
Abstract
We report rate coefficients for electronic quenching of NO A 2Σ+ v’=0 by N2 measured at room temperature and at high temperatures behind reproducible shock waves. The quenching cross section increases from 0.007 Å2 at 300 K to 7 Å2 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 (v’=0) and a collisionally populated level (v’=1); from these results we obtain rate coefficients for vibrational energy transfer in NO (A) and electronic quenching of v’=1 at 1900 K.Keywords
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