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physics.atom-ph2026★ 1 cited
Optically Derived Radio-Frequency Benchmark in Methanol: A Sub-kHz Reference for Astrophysical Tests of Fundamental Physics
Frank M. J. Cozijn, Arthémise Altman, Alexandr S. Bogomolov +8
Methanol radio lines observed in space provide sensitive probes of whether the proton-to-electron mass ratio has changed over cosmic time, but such tests require laboratory rest fr…
physics.atom-ph2025
Letokhov-Chebotayev intracavity trapping spectroscopy of H
Wim Ubachs, Frank M. J. Cozijn, Meissa L. Diouf +3
In the early days of laser spectroscopy Letokhov and Chebotayev proposed a scheme for measuring narrow spectral lines where the resolution is not restricted to Doppler effects beca…