Frequency comb-referenced spectroscopic measurements in the second overtone of HD
(2026) Molecular Physics : an international journal at the interface between chemistry and physics — p. e2621077 (2026)
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- Abstract
- The Doppler broadened R(0), P(1) and P(2) lines of the (v’← v’’)=(3←0) vibrational band of HD have been measured at the MHz accuracy level using a comb-referenced continuous-wave cavity ring-down spectrometer. The transition frequencies are found to be 305141769.4 ± 5.0, 308138756.2 ± 4.0 and 313148302.4 ± 9.0 MHz for the P(2), P(1) and R(0) transitions, respectively. This is the first spectroscopic measurement of HD at this level of accuracy for such a high-vibrational excitation. It represents an accuracy improvement by a factor of 50 compared to the literature.
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Citations
Bogomolov, A., Fleurbaey, H., Kassi, S., & Lauzin, C. (2026). Frequency comb-referenced spectroscopic measurements in the second overtone of HD. Molecular Physics : an international journal at the interface between chemistry and physics, e2621077. https://doi.org/10.1080/00268976.2026.2621077 (Original work published 2026)