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Published September 2008 | public
Journal Article

High-accuracy transition frequencies for the O_2 A-band


Frequencies for 32 P-branch transitions of the O2 A-band (b1Σ+g ← Χ3Σ-u) were measured between 12975 and 13115 cm^−1 using the frequency-stabilized cavity ring-down spectrometer located at National Institute of Standards and Technology, Gaithersburg, MD. Absolute line positions were calibrated using the hyperfine components of 39K D1 and D2 atomic transitions yielding uncertainties <1 MHz (~3 × 10^−5 cm^−1). Spectroscopic parameters for the b1Σ+g(ν=0) state were calculated and compared with previously determined values. These new transition frequencies should serve as a convenient secondary calibration standard in the 760 nm region.

Additional Information

© 2008 Elsevier. Received 8 December 2007. Available online 3 January 2008. Part of the research described in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with The National Aeronautics and Space Administration (NASA). Additional support was provided by the Orbiting Carbon Observatory (OCO) project, a NASA Earth System Science Pathfinder (ESSP) mission; the NASA Upper Atmospheric Research Program Grant NNG06GD88G; and the NIST Office of Microelectronics Programs. L.Y.Y. acknowledges the support of the Davidow Graduate Fellowship in Environmental Science and the Dow Chemical Company Travel Fellowship. We thank Jeffrey Anderson (NIST Fabrication Technology Division) for preparing the potassium reference cell, Dr. Roman Ciuryło (Uniwersytet Mikołaja Kopernika) for useful discussions on saturation spectroscopy and Drs. Craig Sansonetti (NIST Atomic Physics Division) and Alan Pine for carefully reviewing the manuscript and offering important suggestions. Special issue dedicated to the pioneering work of Drs. Edward A. Cohen and Herbert M. Pickett on spectroscopy relevant to the Earth's atmosphere and astrophysics. Journal of Molecular Spectroscopy, Volume 251, Issues 1-2, September-October 2008.

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