Open AccessNear‐infrared absorption cross sections and integrated absorption intensities of molecular oxygen (O 2 , O 2 ‐O 2 , and O 2 ‐N 2 )
Author(s) -
Smith K. M.,
Newnham D. A.
Publication year - 2000
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/1999jd901171
Subject(s) - analytical chemistry (journal) , absorption spectroscopy , infrared spectroscopy , oxygen , absorption (acoustics) , materials science , infrared , nitrogen , spectral line , solid oxygen , chemistry , optics , physics , organic chemistry , chromatography , astronomy , composite material
Near‐infrared absorption cross sections and integrated absorption intensities of gas phase oxygen and nitrogen mixtures have been determined from laboratory measurements using a coolable multipass gas cell and Fourier transform spectroscopy. Spectra were recorded at instrument resolutions of 0.5 and 0.05 cm −1 , between 2200–12,500 cm −1 (between 4.5 and 0.8 μm). Monomer and binary cross sections of the a 1 Δ g ← χ 3 Σ g − (0,0) and (1,0) bands and underlying continuum absorptions of oxygen centered near 7,850 and 9,400 cm −1 (1.27 and 1.06 μm) were determined for mixtures of 21%, 50%, and 75% oxygen in nitrogen, from measurements at a total pressure of 100 kPa (1000 mbar) and temperatures of 200, 230, and 294 K. Where possible, comparisons are made between the results obtained from this work and those of previous studies.