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  • W.M.G. Ubachs
2012

A Rayleigh-Brillouin scattering spectrometer for ultraviolet wavelengths

Gu, Z. Y., Vieitez, M. O., van Duijn, E. J. & Ubachs, W. M. G., 2012, In : Review of Scientific Instruments. 83, 5

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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CO A-X system for constraining cosmological drift of the proton-electron mass ratio

Salumbides, E. J., Niu, M., Bagdonaite, J., de Oliveira, N., Joyeux, D., Nahon, L. & Ubachs, W. M. G., 2012, In : Physical Review A. 86, 2, p. 1-7 022510.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Constraint on a variation of the proton-to-electron mass ratio from H-2 absorption towards quasar Q2348-011

Bagdonaite, J., Murphy, M. T., Kaper, L. & Ubachs, W. M. G., 2012, In : Monthly Notices of the Royal Astronomical Society. 421, 1, p. 419-425

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Determination of the ionization and dissociation energies of H2 and He2

Liu, J., Sprecher, D., Merkt, F., Salumbides, E. J. & Ubachs, W., 2012, International Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009. Vol. 1504. p. 495-498 4 p.

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Frequency comb generation by CW laser injection into a quantum-dot mode-locked laser

Pinkert, T. J., Salumbides, E. J., Tahvili, M. S., Ubachs, W. M. G., Bente, E. A. J. M. & Eikema, K. S. E., 2012, In : Optics Express. 20, 19, p. 21357-21371

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Observation of the v '=8 <- v=0 vibrational overtone in cold trapped HD+

Koelemeij, J. C. J., Noom, D. W. E., de Jong, D., Haddad, M. A. & Ubachs, W. M. G., 2012, In : Applied Physics B. Lasers and Optics. 107, 4, p. 1075-1085

Research output: Contribution to JournalArticleAcademicpeer-review

Plasmon switching: Observation of dynamic surface plasmon steering by selective mode excitation in a sub-wavelength slit

Visser, T. D., Raghunathan, S. B., van Dijk, T., Schouten, H. F., Ubachs, W., Lalanne, P., Ea Kim, B. & Gan, C. H., 2012, Frontiers in Optics, FIO 2012.

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Plasmon switching: Observation of dynamic surface plasmon steering by selective mode excitation in a sub-wavelength slit

Raghunathan, S. B., Gan, C. H., van Dijk, T., Kim, B. E., Schouten, H., Ubachs, W. M. G., Lalanne, P. & Visser, T. D., 2012, In : Optics Express. 20, 14, p. 15326-15335

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Precision spectroscopy of high rotational states in H-2 investigated by Doppler-free two-photon laser spectroscopy in the EF (1)Sigma(+)(g)-X (1)Sigma(+)(g) system

Dickenson, G. D., Salumbides, E. J., Niu, M., Jungen, C., Ross, S. C. & Ubachs, W. M. G., 2012, In : Physical Review A. 86, 3

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Sensitivity of rotational transitions in CH and CD to a possible variation of fundamental constants

de Nijs, A. J., Ubachs, W. M. G. & Bethlem, H. L., 2012, In : Physical Review A. 86, 3

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Sensitivity to a possible variation of the proton-to-electron mass ratio torsion-wagging-rotation transitions in methylamine CH3NH2

Ilyushin, V. V., Jansen, P., Kozlov, M. G., Levshakov, S. G., Kleiner, I., Ubachs, W. M. G. & Bethlem, H. L., 2012, In : Physical Review A. 85, 3, 032505.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Spin-orbit Splitting and Lifetime Broadening in the A(2)Delta Electronic State of l-C5H

Haddad, M. A., Zhao, D., Linnartz, H. V. J. & Ubachs, W. M. G., 2012, In : Chinese Journal of Chemical Physics. 25, 2, p. 129-134

Research output: Contribution to JournalArticleAcademicpeer-review

Testing the time-invariance of fundamental constants using cold and not-so-cold molecules

Bethlem, H. L., Jansen, P. & Ubachs, W., 2012, International Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009. Vol. 1504. p. 454-457 4 p.

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

The D-1 Pi(u) state of HD and the mass scaling relation of its predissociation widths

Dickenson, G. D. & Ubachs, W. M. G., 2012, In : Journal of Physics B: Atomic, Molecular and Optical Physics. 45, 14

Research output: Contribution to JournalArticleAcademicpeer-review

The electronic spectrum of the Cs-C11H3 radical

Zhao, D., Linnartz, H. V. J. & Ubachs, W. M. G., 2012, In : Journal of Chemical Physics. 136, 5, p. 054307

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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VUV Fourier-transform absorption study of the Lyman and Werner bands in D-2

de Lange, A., Dickenson, G. D., Salumbides, E. J., Ubachs, W. M. G., de Oliveira, N., Joyeux, D. & Nahon, L., 2012, In : Journal of Chemical Physics. 136, 23

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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2013

A stringent limit on a drifting proton-to-electron mass ratio from alcohol in the early Universe

Bagdonaite, J., Jansen, P., Henkel, C., Bethlem, H. L., Menten, K. & Ubachs, W. M. G., 2013, In : Science. 339, 6115, p. 46-48 3 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Bounds on fifth forces from precision measurements on molecules

Salumbides, E. J., Koelemeij, J. C. J., Komasa, J., Pachucki, K., Eikema, K. S. E. & Ubachs, W. M. G., 2013, In : Physical Review D. 87, 11, 112008.

Research output: Contribution to JournalArticleAcademicpeer-review

Dynamic beam steering from a sub-wavelength slit by selective excitation of guided modes

Raghunathan, S. B., Schouten, H., Ubachs, W. M. G., Kim, E., Gan, C. H. & Visser, T. D., 2013, In : Physical Review Letters. 111, 15, 153901.

Research output: Contribution to JournalArticleAcademicpeer-review

Fundamental vibration of molecular hydrogen.

Dickenson, G. D., Niu, M., Salumbides, E. J., Komasa, J., Eikema, K. S. E., Pachucki, K. & Ubachs, W. M. G., 2013, In : Physical Review Letters. 110, 19, p. 193601

Research output: Contribution to JournalArticleAcademicpeer-review

High resolution spectroscopy and perturbation analysis of the CO A1Π -X1Σ+ (0,0) and (1,0) bands

Niu, M., Salumbides, E. J., Zhao, D., de Oliveira, N., Joyeux, D., Nahon, L., Field, R. W. & Ubachs, W. M. G., 2013, In : Molecular Physics. 111, 14-15, p. 2163-214-74

Research output: Contribution to JournalArticleAcademicpeer-review

Laser cooling of beryllium ions using a frequency-doubled 626 nm diode laser

Cozijn, F. M. J., Biesheuvel, J., Flores, A. S., Ubachs, W. M. G., Blume, G., Wicht, A., Paschke, K., Erbert, G. & Koelemeij, J. C. J., 2013, In : Optics Letters. 38, 13, p. 2370-2372

Research output: Contribution to JournalArticleAcademicpeer-review

Methyl mercaptan (CH3SH) as a probe for variation of the proton-to-electron mass ratio

Jansen, P., Xu, L. H., Kleiner, I., Bethlem, H. L. & Ubachs, W. M. G., 2013, In : Physical Review A. 87, 5, 052509.

Research output: Contribution to JournalArticleAcademicpeer-review

Optomechanical Shutter Modulated Broad-Band Cavity−Enhanced Absorption Spectroscopy of Molecular Transients of Astrophysical Interest

Walsh, A., Zhao, D., Ubachs, W. M. G. & Linnartz, H. V. J., 2013, In : Journal of Physical Chemistry A.

Research output: Contribution to JournalArticleAcademicpeer-review

Photodissociation of interstellar N2

Li, X., Heays, A. N., Visser, R., Ubachs, W. M. G., Lewis, B. R., Gibson, S. T. & van Dishoeck, E. F., 2013, In : Astronomy and Astrophysics. 555, 18 p., A14.

Research output: Contribution to JournalArticleAcademicpeer-review

Precision metrology on the hydrogen atom in search for new physics

Ubachs, W. M. G., Vassen, W., Salumbides, E. J. & Eikema, K. S. E., 2013, In : Annalen der Physik. 525, 7, p. A113-a115

Research output: Contribution to JournalArticleAcademicpeer-review

Prospects for high-resolution microwave spectroscopy of methanol in a Stark-deflected molecular beam

Jansen, P., Kleiner, I., Meng, C., Lees, R., Janssen, M. H. M., Ubachs, W. M. G. & Bethlem, H. L., 2013, In : Molecular Physics. 111, 12-13, p. 1923-1930

Research output: Contribution to JournalArticleAcademicpeer-review

Rayleigh-Brillouin scattering profiles of air at different temperatures and pressures

Gu, Z., Witschas, B., van der Water, W. & Ubachs, W. M. G., 2013, In : Applied Optics. 52, 19, p. 4640-51

Research output: Contribution to JournalArticleAcademicpeer-review

Robust Constraint on a Drifting Proton-to-Electron Mass Ratio at z=0: 89 from Methanol Observation at Three Radio Telescopes

Bagdonaite, J., Dapra, M., Jansen, P., Bethlem, H. L., Ubachs, W. M. G., Muller, S., Henkel, C. & Menten, K. M., 2013, In : Physical Review Letters. 111, 23, 231101.

Research output: Contribution to JournalArticleAcademicpeer-review

Temperature-dependent bulk viscosity of nitrogen gas determined from spontaneous Rayleigh-Brillouin scattering

Gu, Z. & Ubachs, W. M. G., 2013, In : Optics Letters. 38, 7, p. 1110-2

Research output: Contribution to JournalArticleAcademicpeer-review

Testing the mass-scaling relations in the a3P state of 12C18O and 13C16O

de Nijs, A. J., Zhao, D., Bethlem, H. L., Linnartz, H. V. J. & Ubachs, W. M. G., 2013, In : Journal of Molecular Spectroscopy. 292, p. 20-22

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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The H2 molecule; test of QED and varying constants

Ubachs, W., 2013, Laser Science, LS 2013. Optical Society of America

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset

Biesheuvel, J., Noom, D. W. E., Salumbides, E. J., Sheridan, K. T., Ubachs, W. M. G. & Koelemeij, J. C. J., 2013, In : Optics Express. 21, 12, p. 14008-14016

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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2014

ANALYSIS OF MOLECULAR HYDROGEN ABSORPTION TOWARD QSO B0642-5038 FOR A VARYING PROTON-TO-ELECTRON MASS RATIO

Bagdonaite, J., Ubachs, W. M. G., Murphy, M. T. & Whitmore, J. B., 2014, In : Astrophysical Journal. 782, 1, 10.

Research output: Contribution to JournalArticleAcademicpeer-review

Analysis of Rayleigh-Brillouin spectral profiles and Brillouin shifts in nitrogen gas and air

Ma, Y., Li, H., Gu, Z., Ubachs, W. M. G., Yu, Y., Huang, J., Zhou, B., Wang, Y. & Liang, K., 2014, In : Optics Express. 22, 2, p. 2092-2104

Research output: Contribution to JournalArticleAcademicpeer-review

A systematic study of Rayleigh-Brillouin scattering in air, N-2, and O-2 gases

Gu, Z. & Ubachs, W. M. G., 2014, In : Journal of Chemical Physics. 141, 10, 104320.

Research output: Contribution to JournalArticleAcademicpeer-review

B1Su+ and EF1Sg+ level energies of D2

Salumbides, E. J., Bailly, D., Vervloet, M. & Ubachs, W. M. G., 2014, In : Journal of Molecular Spectroscopy. 305, p. 34-39

Research output: Contribution to JournalArticleAcademicpeer-review

Bounds on fifth forces at the sub-angstrom length scale

Salumbides, E. J., Ubachs, W. M. G. & Korobov, V. I., 2014, In : Journal of Molecular Spectroscopy. 300, SI, p. 65-69

Research output: Contribution to JournalArticleAcademicpeer-review

Broadband cavity enhanced absorption spectroscopy: A new approach to search for DIB carriers

Walsh, A. J., Zhao, D., Ubachs, W. & Linnartz, H., Feb 2014, In : Proceedings of the International Astronomical Union. 9, S297, p. 281-285 5 p.

Research output: Contribution to JournalArticleAcademicpeer-review

H2 as a possible carrier of the DIBs?

Ubachs, W., Feb 2014, In : Proceedings of the International Astronomical Union. 9, S297, p. 375-377 3 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Introduction to the Special issue Spectroscopic Tests of Fundamental Physics

Steimle, T. & Ubachs, W. M. G., 2014, In : Journal of Molecular Spectroscopy. 300, SI, p. 1-2 2 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Isotope selective photodissociation of N-2 by the interstellar radiation field and cosmic rays

Heays, A. N., Visser, R., Gredel, R., Ubachs, W. M. G., Lewis, B. R., Gibson, S. T. & van Dishoeck, E. F., 2014, In : Astronomy and Astrophysics. 562, A61.

Research output: Contribution to JournalArticleAcademicpeer-review

Limits on a gravitational field dependence of the proton-electron mass ratio from h_{2} in white dwarf stars.

Bagdonaite, J., Salumbides, E. J., Preval, S. P., Barstow, M. A., Barrow, J. D., Murphy, M. T. & Ubachs, W. M. G., 2014, In : Physical Review Letters. 113, 12, 123002.

Research output: Contribution to JournalArticleAcademicpeer-review

Novel techniques in VUV high-resolution spectroscopy

Ubachs, W. M. G., Salumbides, E. J., Eikema, K. S. E., de Oliveira, N. & Nahon, L., 2014, In : Journal of Electron Spectroscopy and Related Phenomena. 196, p. 159-164

Research output: Contribution to JournalArticleAcademicpeer-review

Perspective: Tipping the scales: Search for drifting constants from molecular spectra

Jansen, P., Bethlem, H. L. & Ubachs, W. M. G., 2014, In : Journal of Chemical Physics. 140, 1, 010901.

Research output: Contribution to JournalArticleAcademicpeer-review

Precision spectroscopy of the X-1 Sigma(+)(g), v=0 -> 1(J=0-2) rovibrational splittings in H-2, HD and D-2

Niu, M., Salumbides, E. J., Dickenson, G. D., Eikema, K. S. E. & Ubachs, W. M. G., 2014, In : Journal of Molecular Spectroscopy. 300, SI, p. 44-54

Research output: Contribution to JournalArticleAcademicpeer-review

Ramsey-type microwave spectroscopy on CO (alpha(3) II)

de Nijs, A. J., Ubachs, W. M. G. & Bethlem, H. L., 2014, In : Journal of Molecular Spectroscopy. 300, SI, p. 79-85

Research output: Contribution to JournalArticleAcademicpeer-review

Rayleigh-Brillouin scattering of carbon dioxide

Gu, Z., Ubachs, W. M. G. & van der Water, W., 2014, In : Optics Letters. 39, 11, p. 3301-3304

Research output: Contribution to JournalArticleAcademicpeer-review

Rotationally resolved spectra of the 4051 angstrom comet band of C-3 for all six C-12 and C-13 isotopologues

Haddad, M. A., Zhao, D., Linnartz, H. V. J. & Ubachs, W. M. G., 2014, In : Journal of Molecular Spectroscopy. 297, p. 41-50

Research output: Contribution to JournalArticleAcademicpeer-review

Temperature retrieval from Rayleigh-Brillouin scattering profiles measured in air

Witschas, B. & Ubachs, W. M. G., 2014, In : Optics Express. 22, 24, p. 29655-29667

Research output: Contribution to JournalArticleAcademicpeer-review