https://doi.org/10.1140/epjd/e2009-00313-4
Temperature dependence of the quenching of N2 (C 3 Πu) by N2 (X) and O2 (X)
1
LIP-Coimbra and Departamento de Física, Universidade de Coimbra,
3004-516 Coimbra, Portugal
2
Physik Department E12, Technische Universität München, 85748
Garching, Germany
3
Coherent GmbH, Zielstattstrasse 32, 81379 München, Germany
Corresponding author: andrei@coimbra.lip.pt
Received:
27
August
2009
Revised:
13
November
2009
Published online:
22
December
2009
The temperature dependences of the quenching rate constants of the states
N2 (
v′=0,1) by N2 (X) and of the state
N2 (
) by O2 (X) are studied.
Time-resolved light emission from the gas was analyzed in the temperature
range from 300 K to 210 K keeping the gas at constant density. In case of
quenching by N2 (X), the quenching rate constant for the vibrational
level v′ = 0 increases by (13 ±3)% with gas cooling whereas the
quenching rate constant for v′ = 1 decreases by (5.0 ±2.5)% in this
temperature range. For quenching by O2 (X), the quenching rate constant
decreases by (3 ±2)% with gas cooling. The temperature variation of
the N2 (C 3Πu v′=0) emission intensity for pure nitrogen
and dry air are calculated using the obtained quenching rate constants and
is compared with the experimental data available in the literature.
PACS: 34.80.Gs – Molecular excitation and ionization / 33.50.Hv – Radiationless transitions, quenching / 33.70.Fd – Absolute and relative line and band intensities
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009
