The effect of collisions with nitrogen on absorption by oxygen in the A-band using cavity ring-down spectroscopy.

Frans Spiering (1) , Maria Kiseleva (1, 2) , Nikolay N. Filippov (2) , Bas Lieshout (1) , Adriaan van Der Veen (3) , Wim van Der Zande (1)

1 Molecular and Biophysics
2 Institute of Physics
3 Nederlands Meetinstituut

This paper reports on the effect of collisions between nitrogen and oxygen on absorption in the A-band near 760 nm under atmospheric conditions relevant for satellite retrieval studies. We use pulsed laser cavity ring-down spectroscopy with a narrow bandwidth laser and use pressure scans to increase the accuracy of the measured oxygen extinction coefficients. We use the so-called Adjustable Branch Coupling model to describe line mixing in the magnetic allowed A-Band dipole absorption and we retrieve the collision induced absorption spectrum due to N$_2$-O$_2$ collisions.

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]

Frans Spiering, Maria Kiseleva, Nikolay N. Filippov, Bas Lieshout, Adriaan van Der Veen, et al.. The effect of collisions with nitrogen on absorption by oxygen in the A-band using cavity ring-down spectroscopy.. Molecular Physics, 2011, 109 (04), pp.535-542. ⟨10.1080/00268976.2010.533709⟩. ⟨hal-00670237⟩