Temperature Dependent Photoabsorption Cross Section Measurements of
O2 at the NI Airglow and Auroral Emission Lines
I. Kanik, L. Beegle, C. Noren, S. M. Ahmed, and R. Link
In this paper, we report the first temperature-dependent measurement
(at 295, 373, 473, and 573 K) of the O2 photoabsorption cross
sections at the aeronomically-important NI airglow and auroral
emission lines (at 1200, 1492, and 1742 Å) in the far ultraviolet spectral
region. A high current, low voltage argon mini-arc source was used as the light
source in the present measurements. The measurements were carried out at a
spectral resolution of 0.30 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
NI line of interest.
Back to project description
Back to Richard Link publications