164 citations · 1.1k across the 34 of their papers we have counts for
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Novel techniques in VUV high-resolution spectroscopy
W. Ubachs, E. J. Salumbides, K. S. E. Eikema +2
Novel VUV sources and techniques for VUV spectroscopy are reviewed. Laser-based VUV sources have been developed via non-linear upconversion of laser pulses in the nanosecond (ns),…
Bounds on fifth forces at the sub-Angstrom length scale
E. J. Salumbides, W. Ubachs, V. I. Korobov
Constraints on a possible fifth-force interaction between hadrons are derived based on an analysis of results from laser precision frequency measurements of antiprotonic helium ato…
Analysis of Molecular Hydrogen Absorption toward QSO B0642-5038 for a Varying Proton-to-Electron Mass Ratio
Julija Bagdonaite, Wim Ubachs, Michael T. Murphy +1
Rovibronic molecular hydrogen (H) transitions at redshift towards the background quasar B06425038 are examined for a possible cosmological variati…
Bounds on fifth forces from precision measurements on molecules
E. J. Salumbides, J. C. J. Koelemeij, J. Komasa +3
Highly accurate results from frequency measurements on neutral hydrogen molecules H_2, HD and D_2 as well as the HD^+ ion can be interpreted in terms of constraints on possible fif…
The Fundamental Vibration of Molecular Hydrogen
Gareth. D. Dickenson, Ming Li Niu, Edcel J. Salumbides +4
The fundamental ground tone vibration of H2, HD, and D2 is determined to an accuracy of 2 x 10^-4 cm^-1 from Doppler-free laser spectroscopy in the collisionless environment of a m…