| Zugriffsnummer | 55702 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Unprecedented accuracy in molecular line-intensity ratios from frequency-based measurements. |
| Autor(in); Institution |
Li, Jin-Ke; Hefei National Laboratory, University of Science and Technology of China, Hefei, CHINA; State Key Laboratory of Chemical Reaction Dynamics, Department of Chemical Physics, University of Science and Technology of China, Hefei, CHINA
Wang, Jin; Hefei National Laboratory, University of Science and Technology of China, Hefei, CHINA
Yin, Rui-Heng; Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, CHINA
Huang, Qi; Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, CHINA
Tan, Yan; Hefei National Laboratory, University of Science and Technology of China, Hefei, CHINA; Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, CHINA
Hu, Chang-Le; Hefei National Laboratory, University of Science and Technology of China, Hefei, CHINA; Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, CHINA
Sun, Yu R.; Institute of Advanced Light Source Facilities, Shenzhen, CHINA
Polyansky, Oleg L.; Department of Physics and Astronomy, University College London, Gower St, London, UK
Zobov, Nikolai F.; Department of Physics and Astronomy, University College London, Gower St, London, UK
Lebedev, Evgenii I.; Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, CHINA
Stosch, Rainer; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig
Tennyson, Jonathan; Department of Physics and Astronomy, University College London, Gower St, London, UK
Li, Gang; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig
Hu, Shui- Ming; Hefei National Laboratory, University of Science and Technology of China, Hefei, CHINA
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| Quelle/Jahr | Science Advances: 11 (2025), 38, 1 - 7 |
| Artikelnummer | eadz6560 |
| Availability | [online only] |
| ISSN | 2375-2548 (online) |
| DOI | |
| Verlag | Washington, DC [u.a.]: American Association for the Advancement of Science (AAAS) |
| Zusammenfassung | Accurate determination of molecular transition intensities is vital to quantum chemistry and metrology, yet even simple diatomic molecules have historically been limited to 0.1% accuracy. Here, we show that frequency-domain measurements of relative intensity ratios outperform absolute methods, achieving 0.003% accuracy using dual-wavelength cavity mode dispersion spectroscopy. Enabled by high-precision frequency metrology, this approach reveals systematic discrepancies with state-of-the-art ab initio calculations, exposing subtle electron correlation effects in the dipole moment curve. Applied to line-intensity ratio thermometry (LRT), our technique determines gas temperatures with 0.5 millikelvin statistical uncertainty, exceeding previous LRT precision by two orders of magnitude. These results redefine the limits of optical gas metrology and enable International System of Units–traceable measurements for applications from combustion diagnostics to isotopic analysis. Discrepancies of up to 0.02% in transition probability ratios challenge theorists to refine models, establishing intensity ratios as a paradigm in precision molecular physics. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY-NC-ND 4.0 ; Creative Commons Attribution NonCommercial NoDerivatives 4.0 License |
Zitierung
Li, J.-K., Wang, J., Yin, R.-H., Huang, Q., Tan, Y., Hu, C.-L., Sun, Y. R., Polyansky, O. L., Zobov, N. F., Lebedev, E. I., Stosch, R., Tennyson, J., Li, G., & Hu, S. M. (2025). Unprecedented accuracy in molecular line-intensity ratios from frequency-based measurements. Science Advances, 11(38), 1–7. https://doi.org/10.1126/sciadv.adz6560