Fig. 3: Determination of the frequency of the Q(1) 1-0 line of H2.
From: Stimulated Raman scattering metrology of molecular hydrogen
a Inferred \({\nu }_{0}\) as a function of the maximum pressure pmax considered for the global fitting. The collisional parameters are fixed to ab initio parameters except \({\delta }_{0}\), which is fixed to the three different values specified in the legend, generating the three trajectories shown here. b Zoomed-in view of the low-pressure range together with parabolic extrapolations (lines) to pmax = 0. The vertical axis reports the difference between the fitted \({\nu }_{0}\) and the ab initio value \({\nu }_{{{{{{\rm{ref}}}}}}}\) calculated by Komasa et al.4.
