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Published November 24, 2009 | public
Journal Article

Ultra-sensitive optical measurements of high-J transitions in the O_2 A-band


We report frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) measurements of high-J O_2 A-band magnetic dipole line parameters. Our goals were to measure intensities and line shape parameters for the primary isotopologue of O_2 in the A-band region and to understand how these quantities compare to, and build on those contained in the Hitran database. These experiments quantify line parameters of some of the weakest transitions ever observed in the laboratory. We have measured line intensities as low as 1 × 10^(−30) cm molecule^(−1). Our data extend available data in the P-branch up to J′ = 50. Additionally, we have characterized the self-broadened and air-broadened line widths and provide new J-dependent correlation functions.

Additional Information

© 2009 Published by Elsevier B.V. Received 23 September 2009; accepted 22 October 2009. Available online 24 October 2009. Daniel K. Havey received support from the National Research Council as a postdoctoral fellow at NIST. David A. Long was supported by the National Defense Science and Engineering Graduate Fellowship. Part of the research described in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. Additional support was provided by the Orbiting Carbon Observatory (OCO) project, a NASA Earth System Science Pathfinder (ESSP) mission; and the NASA Upper Atmospheric Research Program grants NNG06GD88G and NNX09AE21G.

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August 19, 2023
October 19, 2023