Line mixing and collision induced absorption in the oxygen A-band using cavity ring-down spectroscopy.
This paper reports on the absorption of molecular oxygen in the region of 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. Absolute binary absorption coefficients in minima between absorption lines of the A-band spectrum have been measured and tabulated. We use the so-called adjustable branch coupling model including line mixing to calculate the magnetic dipole absorption in order to determine the contribution of collision induced absorption. The line mixing model has been optimized such that the collision induced absorption spectrum is smooth.
Spiering
Frans R
FR
Institute for Molecules and Matter, Radboud University, Nijmegen 6525AJ, The Netherlands. f.spiering@science.ru.nl
Kiseleva
Maria B
MB
Filippov
Nikolay N
NN
Naus
Hans
H
van Lieshout
Bas
B
Weijenborg
Chris
C
van der Zande
Wim J
WJ