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- Title
All paths lead to hubs in the spectroscopic networks of water isotopologues H<sub>2</sub><sup>16</sup>O and H<sub>2</sub><sup>18</sup>O.
- Authors
Tóbiás, Roland; Diouf, Meissa L.; Cozijn, Frank M. J.; Ubachs, Wim; Császár, Attila G.
- Abstract
Network theory has fundamentally transformed our comprehension of complex systems, catalyzing significant advances across various domains of science and technology. In spectroscopic networks, hubs are the quantum states involved in the largest number of transitions. Here, utilizing network paths probed via precision metrology, absolute energies have been deduced, with at least 10-digit accuracy, for almost 200 hubs in the experimental spectroscopic networks of H216O and H218O. These hubs, lying on the ground vibrational states of both species and the bending fundamental of H216O, are involved in tens of thousands of observed transitions. Relying on the same hubs and other states, benchmark-quality line lists have been assembled, which supersede and improve, by three orders of magnitude, the accuracy of the massive amount of data reported in hundreds of papers dealing with Doppler-limited spectroscopy. Due to the omnipresence of water, these ultraprecise line lists could be applied to calibrate high-resolution spectra and serve ongoing and upcoming space missions. Ultraprecise spectral line lists of molecules such as water, omnipresent in various environments, can be used to calibrate high-resolution spectra, which is particularly relevant for exoplanet transit observations. Here, the authors use measured spectra and network theory to achieve ultraprecise characterization of H216O and H218O hubs, the most relevant quantum states within a spectroscopic network.
- Subjects
NETWORK hubs; ISOTOPOLOGUES; QUANTUM states; METROLOGY
- Publication
Communications Chemistry, 2024, Vol 7, p1
- ISSN
2399-3669
- Publication type
Article
- DOI
10.1038/s42004-024-01103-8