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Ultra-Sensitive Optical Measurements of High-J Transitions in the O2 A-band



Daniel K. Havey, Joseph T. Hodges, David A. Long, Mitchio Okumura, Charles E. Miller


We report frequency-stabilized cavity ring-down spectroscopy measurements of high-J O2 A-band magnetic dipole line parameters. Our goals were to measure intensities and line shape parameters for the primary isotopologue of O2 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 1x10-30 cm molecule-1. Our data build on line intensities in the HITRAN database by extending available measurements in the P-branch up to J’=50. We discuss evidence of a subtle Herman-Wallis effect possibly occurring in the O2 A-band. Additionally, we have characterized the self-broadened and air-broadened line widths between 32≤J’≤50 and 32≤J’≤42, respectively, and provide new J-dependent correlation functions which can be used for future reference.
Chemical Physics Letters


oxygen, A-band, high-resolution, atmospheric spectroscopy, cavity ring-down, atmosphere, remote sensing


Havey, D. , Hodges, J. , Long, D. , Okumura, M. and Miller, C. (2009), Ultra-Sensitive Optical Measurements of High-J Transitions in the O2 A-band, Chemical Physics Letters, [online], (Accessed April 23, 2024)
Created November 24, 2009, Updated November 10, 2018