Collision-induced absorption in the O2 B-band region near 670 nm

被引：15
|
作者：
Spiering, Frans R. [1 ]
Kiseleva, Maria B. [2 ]
Filippov, Nikolay N. [2 ]
van Kesteren, Line [1 ]
van der Zande, Wim J. [1 ]
机构：
[1] Radboud Univ Nijmegen, Dept Mol & Biophys, IMM, NL-6500 GL Nijmegen, Netherlands
[2] St Petersburg State Univ, Fac Phys, Dept Mol Spect, St Petersburg 198504, Russia
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 20期
基金：
俄罗斯基础研究基金会;
关键词：
A-BAND; SYMMETRIZATION POSTULATE; RAYLEIGH-SCATTERING; OXYGEN; PRESSURE; DOPPLER; SPECTRA; COMPLEX; MODEL; TEMPERATURE;
D O I：
10.1039/c1cp20403c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：9616 / 9621
页数：6
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