Fig. 7: Overview of selected determinations of the lowest ortho energy of H216O.
From: Spectroscopic-network-assisted precision spectroscopy and its application to water
On the vertical axis, the publication year is provided for the present and the literature49,58,59,60,61,62,54,55,56 determinations. In ref. 54, two different estimates ([I] and [II] in this figure) are reported. Data from Toth62, JPL55, and Coudert et al.56, as well as from this work are displayed in the purple inset. Our predictions [paths #1 and #2: paths of Fig. 6; EH fit: ground vibrational-state effective Hamiltonian fit (see the main text and Supplementary Note 2)] are repeated in the orange inset for improved transparency. Blue dots are published lowest ortho energy values, while the red ones have been calculated during the present study from the effective Hamiltonian parameters of the original publications. Similarly, blue error bars illustrate originally reported uncertainties, while the red ones are our estimates defined in Supplementary Eq. 12 and analyzed in Supplementary Note 5. Source data are provided as a Source Data file.
