164 citations · 1.1k across the 34 of their papers we have counts for
34 papers
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…
Chirp-compensated pulsed titanium-sapphire laser system for precision spectroscopy
J. Hussels, C. Cheng, E. J. Salumbides +1
Active frequency-chirp compensation for a narrowband pulsed Titanium-Sapphire laser system is demonstrated using an intra-cavity electro-optic modulator resulting in improved spect…
Two-photon Doppler-free ultraviolet laser spectroscopy on sulphur atoms
K. -F. Lai, E. J. Salumbides, W. Ubachs
The P - P transition in the sulphur atom is investigated in a precision two-photon excitation scheme under Doppler-free and collision-fr…
Precision measurement of the fundamental vibrational frequencies of tritium-bearing hydrogen molecules: T, DT, HT
K. -F. Lai, V. Hermann, T. M. Trivikram +4
High-resolution coherent Raman spectroscopic measurements of all three tritium-containing molecular hydrogen isotopologues T, DT and HT were performed to determine the ground e…
Relativistic and QED effects in the fundamental vibration of T
T. Madhu Trivikram, M. Schlösser, W. Ubachs +1
The hydrogen molecule has become a test ground for quantum electrodynamical calculations in molecules. Expanding beyond studies on stable hydrogenic species to the heavier radioact…
Sub-Doppler frequency metrology in HD for test of fundamental physics
F. M. J. Cozijn, P. Dupre, E. J. Salumbides +2
Weak transitions in the (2,0) overtone band of the HD molecule at m were measured in saturated absorption using the technique of noise-immune cavity-enhanced optical…