Chem. Phys. Lett., 259, 545, 1996.

Temperature-Dependent Photoabsorption Cross Section Measurements of O₂ at the OI-1304 Å Triplet Emission Lines

S.M. Ahmed, I. Kanik, and R. Link

We report the first temperature-dependent measurements (at 295, 373, 473, and 573 K) of the O₂ photoabsorption cross sections at the aeronomically-important OI-1304 Å triplet emission lines. A high current, low voltage argon mini-arc source was used as the light source. The measurements were carried out at a spectral resolution of 0.5 Å at full-width-at-half-maximum (FWHM). Direct application of the Beer-Lambert absorption equation yielded the absolute photoabsorption cross sections for O₂ at each line of the OI triplet.

from Table 2 (in units of 10^-19 cm²):

Wavelength (Å)	295 K	373 K	473 K	573 K
1302.17	4.33 ± 0.9%	4.53 ± 0.7%	4.58 ± 1.4%	4.65 ± 1.9%
1304.86	3.87 ± 1.7%	3.89 ± 1.3%	4.00 ± 1.2%	4.19 ± 2.1%
1306.03	3.56 ± 1.3%	3.69 ± 1.1%	3.95 ± 1.9%	3.92 ± 2.5%

© 1996 Elsevier Science B.V.

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