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Air‐ and oxygen‐broadening coefficients for the O 2 rotational line at 60.46 cm −1
Author(s) -
Jennings D. A.,
Evenson K. M.,
Vanek M. D.,
Nolt I. G.,
Radostitz J. V.,
Chance K. V.
Publication year - 1987
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl014i007p00722
Subject(s) - oxygen , line (geometry) , spectrometer , atomic physics , infrared , analytical chemistry (journal) , terahertz radiation , physics , materials science , optics , chemistry , geometry , mathematics , quantum mechanics , chromatography
Using an NBS laser‐based tunable far infrared spectrometer, we have measured the air‐ and oxygen‐broadening coefficients for the J = 10←10, N = 11←9 O 2 rotational transition at 60.46 cm −1 (1.812 THz). The air‐broadening coefficient is 5.04 ± 0.38 × 10 −7 cm −1 Pa −1 (0.0511±0.0039 cm −1 atm −1 ) (HWHM) at 245±6 K; the oxygen‐broadening coefficient is 4.92±0.47 × 10 −7 cm −1 Pa −1 (0.0499±0.0048 cm −1 atm −1 ) (HWHM) at 259±2 K. These direct experimental measurements of the air‐broadening coefficient should improve the accuracy of retrieval calculations for far infrared stratospheric balloon experiments which use O 2 rotational lines to calibrate the viewing geometry.