N2+ Meinel band quenching coefficients for vibrational levels 0 and 1

Experimental rate coefficients for the quenching of vibrational levels 0 and 1 of the N2+A2Πu state by N2 are presented. The experiments were performed using near-infrared observations of the N2+ Meinel bands excited by electron impact at several pressures of the N2 target/quenching gas. The total r...

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Bibliographic Details
Published in:The Journal of chemical physics 2024-09, Vol.161 (10)
Main Authors: Espy, Patrick J., Pendleton, William R.
Format: Article
Language:English
Subjects:
Electron impact
Energy gap
Infrared analysis
Quenching
Scale height
Online Access:Get full text
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Summary:Experimental rate coefficients for the quenching of vibrational levels 0 and 1 of the N2+A2Πu state by N2 are presented. The experiments were performed using near-infrared observations of the N2+ Meinel bands excited by electron impact at several pressures of the N2 target/quenching gas. The total removal rate coefficients were derived from a Stern–Volmer analysis of the Meinel band intensities as a function of N2 density and yielded rate coefficients of (2.5 ± 0.5 × 10−10) and (5.6 ± 0.6 × 10−10) cm3⋅molecule−1⋅s−1 for vibrational levels 0 and 1, respectively. It is shown that rate coefficients increase with increasing vibrational level and decreasing energy gap. Our results impact modeling studies of the disturbed atmosphere and ionosphere as the reduced quenching rate coefficients for the preferentially excited A-state vibrational levels
ISSN:0021-9606
1089-7690
DOI:10.1063/5.0223913