Spectral line shapes and frequencies of the molecular oxygen B-band R-branch transitions

- Line-shape parameters and intensities of 11 lines determined with subpercent accuracy.
- CRDS spectrometer with optical frequency comb disciplined by GPS used.
- Speed-dependent effects and Dicke narrowing included in data analysis.
- Soft- and hard-collisions model applied for velocity changing collisions.
- Absolute frequencies of the transitions determined with 150 kHz accuracy.

We present the line-shape parameters for the first 11 lines of the oxygen B-band R-branch self-broadened transitions measured at low pressures by the Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectrometer (PDH-locked FS-CRDS) linked to the optical frequency comb. The collisional self-broadening, shifting and narrowing parameters were determined together with the quadratic speed-dependence as well as phase- and velocity-changing correlations parameters. The absolute frequencies of the transitions with combined standard uncertainties below 150 kHz are reported. Dependence of line parameters on choice of the line-shape model is discussed.