Abstract
We present new measurements of the oxygen B-band transitions in the P branch performed with the cavity ring-down spectroscopy (CRDS) and the cavity mode-width spectroscopy (CMWS) techniques. Systematic deviations on the line intensities observed comparing to our previously published data are explained. We reached agreement on unperturbed line positions at the 40 kHz level and on the line intensities below 0.2% for measurements performed with the above two techniques. With significantly increased spectra signal-to-noise ratio we simultaneously observe the speed dependence of collisional broadening and shifting as well as Dicke narrowing in the pressure range as low as 1.1 kPa.
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