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

Published

November 24, 2009

Author(s)

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

Abstract

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.

Citation

Chemical Physics Letters

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.cplett.2009.10.067

Keywords

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

Citation

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], https://doi.org/10.1016/j.cplett.2009.10.067 (Accessed December 4, 2024)