title: Collision-induced absorption in the O2 B-band region near 670 nm.
abstract: We have determined the collision-induced absorption (CIA) spectrum in the O(2) B-band in pure oxygen. We present absolute extinction coefficients of the minimums in between rotational lines using cavity ring-down spectroscopy. The measured extinction is corrected for the B-band magnetic dipole absorption using a model which includes line-mixing. The remaining extinction consists of collision-induced absorption and Rayleigh scattering. We retrieve the magnitude of the Rayleigh scattering and the CIA spectrum based on their individual different behavior with density. The CIA spectrum of the B-band resembles that of the oxygen A-band in shape but not in magnitude. The contribution of CIA to the total B-band absorption is 40% higher in comparison to that of the A-band.
authors.affiliation: Department of Molecular and Biophysics, IMM, Radboud Univerisity, PO box 9010, 6500 GL Nijmegen, The Netherlands. f.spiering@science.ru.nl
authors.forename: Frans R
authors.initials: FR
authors.lastname: Spiering
authors.forename: Maria B
authors.initials: MB
authors.lastname: Kiseleva
authors.forename: Nikolay N
authors.initials: NN
authors.lastname: Filippov
authors.forename: Line
authors.initials: L
authors.lastname: van Kesteren
authors.forename: Wim J
authors.initials: WJ
authors.lastname: van der Zande