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  • W.M.G. Ubachs
Article

Active Two-Dimensional Steering of Radiation from a Nanoaperture

Dreissen, L. S., Schouten, H. F., Ubachs, W., Raghunathan, S. B. & Visser, T. D., 14 Nov 2018, In : Nano Letters. 18, 11, p. 7207-7210 4 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

A high-velocity narrow absorption line outflow in the quasar J212329.6-005052.9

Hamann, F., Kanekar, N., Prochaska, J. X., Murphy, M. T., Ellison, S. L., Malec, A. L., Milutinovic, N. & Ubachs, W. M. G., 2011, In : Monthly Notices of the Royal Astronomical Society. 410, p. 1957-1974

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Analysis of carbon monoxide absorption at zabs ≃ 2.5 to constrain variation of the proton-to-electron mass ratio

Dapra, M., Noterdaeme, P., Vonk, M., Murphy, M. T. & Ubachs, W., 7 Feb 2017, In : Monthly Notices of the Royal Astronomical Society. 467, 4, p. 3848-3855 8 p.

Research output: Contribution to JournalArticleAcademicpeer-review

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

Analysis of the fine structure of Sn11+-Sn14+ ions by optical spectroscopy in an electron-beam ion trap

Windberger, A., Torretti, F., Borschevsky, A., Ryabtsev, A., Dobrodey, S., Bekker, H., Eliav, E., Kaldor, U., Ubachs, W. M. G., Hoekstra, R., Lopez-Urrutia, J. R. C. & Versolato, O. O., 2016, In : Physical Review A. 94, 1, 012506.

Research output: Contribution to JournalArticleAcademicpeer-review

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
File

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
File

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

Benchmarking Theory with an Improved Measurement of the Ionization and Dissociation Energies of H2

Hölsch, N., Beyer, M., Salumbides, E. J., Eikema, K. S. E., Ubachs, W., Jungen, C. & Merkt, F., 15 Mar 2019, In : Physical Review Letters. 122, 10, p. 1-6 6 p., 103002.

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

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

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

Bulk viscosity of CO2 from Rayleigh-Brillouin light scattering spectroscopy at 532 nm

Wang, Y., Ubachs, W. & van de Water, W., 21 Apr 2019, In : Journal of Chemical Physics. 150, 15, p. 1-10 10 p., 154502.

Research output: Contribution to JournalArticleAcademicpeer-review

C-60(+) and the Diffuse Interstellar Bands: An Independent Laboratory Check

Spieler, S., Kuhn, M., Postler, J., Simpson, M., Wester, R., Scheier, P., Ubachs, W., Bacalla, X., Bouwman, J. & Linnartz, H., 10 Sep 2017, In : Astrophysical Journal. 846, 2, 168.

Research output: Contribution to JournalArticleAcademicpeer-review

C6H and C6D: electronic spectra and Renner-Teller analysis

Zhao, D., Haddad, M. A., Linnartz, H. V. J. & Ubachs, W. M. G., 2011, In : Journal of Chemical Physics. 135, p. 044307 044307.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

CARS spectroscopy of the (v=0→1) band in T2

Schlösser, M., Zhao, X., Trivikram, M., Ubachs, W. & Salumbides, E. J., Sep 2017, In : Journal of Physics B: Atomic, Molecular and Optical Physics. 50, 21, 214004.

Research output: Contribution to JournalArticleAcademicpeer-review

Cavity ring-down UV spectroscopy of the C 2 Σ + -X 2 Π electronic transition of CH

Medcraft, C., Linnartz, H. & Ubachs, W., Jun 2019, In : Journal of Molecular Spectroscopy. 360, p. 15-23 9 p.

Research output: Contribution to JournalArticleAcademicpeer-review

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
File

Colloquium: Search for a drifting proton-electron mass ratio from H-2

Ubachs, W. M. G., Bagdonaite, J., Salumbides, E. J., Murphy, M. T. & Kaper, L., 2016, In : Reviews of Modern Physics. 88, 2, 021003.

Research output: Contribution to JournalArticleAcademicpeer-review

Communication: Test of quantum chemistry in vibrationally hot hydrogen molecules

Niu, M., Salumbides, E. J. & Ubachs, W. M. G., 2015, In : Journal of Chemical Physics. 143, 8, p. 081102 081102.

Research output: Contribution to JournalArticleAcademicpeer-review

constraint on a cosmological variation in the proton-to-electron mass ratio from electronic co absorption

Dapra, M., Niu, M., Salumbides, E. J., Murphy, M. T. & Ubachs, W. M. G., 2016, In : Astrophysical Journal. 826, 2, 192.

Research output: Contribution to JournalArticleAcademicpeer-review

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
File

Constraint on a Varying Proton-Electron Mass Ratio 1.5 Billion Years after the Big Bang

Bagdonaite, J., Ubachs, W. M. G., Murphy, M. T. & Withmore, J. B., 2015, In : Physical Review Letters. 114, 7, p. 071301 071301.

Research output: Contribution to JournalArticleAcademicpeer-review

Constraint on a varying proton-to-electron mass ratio from H2 and HD absorption at zabs ≃ 2.34

Daprà, M., Laan, M., Murphy, M. T. & Ubachs, W., 2017, In : Monthly Notices of the Royal Astronomical Society. 465, 4, p. 4057-4073 17 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Constraints on changes in the proton-electron mass ratio using methanol lines

Kanekar, N., Ubachs, W. M. G., Menten, K. M., Bagdonaite, J., Brunthaler, A., Henkel, C., Muller, S., Bethlem, H. L. & Dapra, M., 2015, In : Monthly Notices of the Royal Astronomical Society: Letters. 448, 1, p. L104-L108

Research output: Contribution to JournalArticleAcademicpeer-review

Constraints on extra dimensions from precision molecular spectroscopy

Salumbides, E. J., Schellekens, A. N., Gato-Rivera, B. & Ubachs, W. M. G., 2015, In : New Journal of Physics. 17, p. 033015 033015.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Deep-Ultraviolet Frequency Metrology of H2 for Tests of Molecular Quantum Theory

Altmann, R. K., Dreissen, L. S., Salumbides, E. J., Ubachs, W. & Eikema, K. S. E., 25 Jan 2018, In : Physical Review Letters. 120, 4, 043204.

Research output: Contribution to JournalArticleAcademicpeer-review

Determination of the Interval between the Ground States of Para- and Ortho- H2

Beyer, M., Hölsch, N., Hussels, J., Cheng, C. F., Salumbides, E. J., Eikema, K. S. E., Ubachs, W., Jungen, C. & Merkt, F., 16 Oct 2019, In : Physical Review Letters. 123, 16, p. 1-6 6 p., 163002.

Research output: Contribution to JournalArticleAcademicpeer-review

Direct frequency-comb spectroscopy of a dipole-forbidden clock transition in trapped 40Ca+ ions

Wolf, A. L., Morgenweg, J., Koelemeij, J. C. J., van den Berg, S. A., Ubachs, W. M. G. & Eikema, K. S. E., 2011, In : Optics Letters. 36, 1, p. 49-51 3 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Discovery of a Perseus-like cloud in the early Universe: H I-to-H 2 transition, carbon monoxide and small dust grains at z abs ≈ 2.53 towards the quasar J0000+0048

Noterdaeme, P., Krogager, J. K., Balashev, S., Ge, J., Gupta, N., Krühler, T., Ledoux, C., Murphy, M. T., Pâris, I., Petitjean, P., Rahmani, H., Srianand, R. & Ubachs, W., 1 Jan 2017, In : Astronomy and Astrophysics. 597, A82.

Research output: Contribution to JournalArticleAcademicpeer-review

Dissociation Energy of the Hydrogen Molecule at 10-9 Accuracy

Cheng, C. F., Hussels, J., Niu, M., Bethlem, H. L., Eikema, K. S. E., Salumbides, E. J., Ubachs, W., Beyer, M., Hölsch, N., Agner, J. A., Merkt, F., Tao, L. G., Hu, S. M. & Jungen, C., 6 Jul 2018, In : Physical Review Letters. 121, 1, p. 1-5 5 p., 013001.

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

Effect of soil temperature on optical frequency transfer through unidirectional dense-wavelength-division-multiplexing fiber-optic links

Pinkert, T. J., Boll, O., Willmann, L., Jansen, G. S. M., Dijck, E. A., Groeneveld, B. G. H. M., Smets, R., Bosveld, F. C., Ubachs, W. M. G., Jungmann, K., Eikema, K. S. E. & Koelemeij, J. C. J., 2015, In : Applied Optics. 54, 4, p. 728-738

Research output: Contribution to JournalArticleAcademicpeer-review

Efficient Generation of Extreme Ultraviolet Light from Nd:YAG-Driven Microdroplet-Tin Plasma

Schupp, R., Torretti, F., Meijer, R. A., Bayraktar, M., Scheers, J., Kurilovich, D., Bayerle, A., Eikema, K. S. E., Witte, S., Ubachs, W., Hoekstra, R. & Versolato, O. O., 8 Jul 2019, In : Physical Review Applied. 12, 1, p. 1-11 11 p., 014010.

Research output: Contribution to JournalArticleAcademicpeer-review

Electronic spectra and structure of the non-linear carbon chain C9H3

Zhao, D., Wehres, N., Linnartz, H. V. J. & Ubachs, W. M. G., 2011, In : Chemical Physics Letters. 501, p. 232-237

Research output: Contribution to JournalArticleAcademicpeer-review

Energy-level structure of Sn3+ ions

Scheers, J., Ryabtsev, A., Borschevsky, A., Berengut, J. C., Haris, K., Schupp, R., Kurilovich, D., Torretti, F., Bayerle, A., Eliav, E., Ubachs, W., Versolato, O. O. & Hoekstra, R., 4 Dec 2018, In : Physical Review A. 98, 6, p. 1-12 12 p., 062503.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Excitation of H2 at large internuclear separation: outer well states and continuum resonances

Trivikram, T. M., Salumbides, E. J., Jungen, C. & Ubachs, W., 2 Nov 2019, In : Molecular Physics. 117, 21, p. 2961-2971 11 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Expansion Dynamics after Laser-Induced Cavitation in Liquid Tin Microdroplets

Kurilovich, D., Pinto, T. D. F., Torretti, F., Schupp, R., Scheers, J., Stodolna, A. S., Gelderblom, H., Eikema, K. S. E., Witte, S., Ubachs, W., Hoekstra, R. & Versolato, O. O., 2 Nov 2018, In : Physical Review Applied. 10, 5, p. 1-8 8 p., 054005.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Experimental and theoretical studies of the nps 1Su+ and nppi 1Pu+ (n >= 4, N'=1-6) states of D2: energies, natural widths, absorption line intensities, and dynamics

Glass-Maujean, M., Jungen, C., Vasserot, A. M., Schmoranzer, H., Knie, A., Kübler, S., Ehresmann, A. & Ubachs, W., 23 May 2017, In : Journal of Molecular Spectroscopy. 338, p. 22-71 50 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

First Constraint on Cosmological Variation of the Proton-to-Electron Mass Ratio from Two Independent Telescopes

van Weerdenburg, F., Murphy, M. T., Malec, A. L., Kaper, L. & Ubachs, W. M. G., 2011, In : Physical Review Letters. 106, 18, p. 180802

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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Fourier-transform spectroscopy of 13C17O and deperturbation analysis of the A1Π (υ=0–3) levels

Hakalla, R., Niu, M. L., Field, R. W., Heays, A. N., Salumbides, E. J., Stark, G., Lyons, J. R., Eidelsberg, M., Lemaire, J. L., Federman, S. R., de Oliveira, N. & Ubachs, W., 1 Mar 2017, In : Journal of Quantitative Spectroscopy and Radiative Transfer. 189, p. 312-328 17 p.

Research output: Contribution to JournalArticleAcademicpeer-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
File

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

Gas-Phase Electronic Absorption Spectra of Deuterated Linear Seven-Carbon Radicals

Haddad, M. A., Zhao, D. & Ubachs, W. M. G., 2015, In : Spectroscopy Letters. 48, 8, p. 567-571

Research output: Contribution to JournalArticleAcademicpeer-review

H 2 /HD molecular data for analysis of quasar spectra in search of varying constants

Ubachs, W., Salumbides, E. J., Murphy, M. T., Abgrall, H. & Roueff, E., Feb 2019, In : Astronomy and Astrophysics. 622, p. 1-4 4 p., A127.

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

H-2 Lyman and Werner band lines and their sensitivity for a variation of the proton-electron mass ratio in the gravitational potential of white dwarfs

Salumbides, E. J., Bagdonaite, J., Abgrall, H., Roueff, E. & Ubachs, W. M. G., 2015, In : Monthly Notices of the Royal Astronomical Society. 450, 2, p. 1237-1245

Research output: Contribution to JournalArticleAcademicpeer-review

High accuracy theoretical investigations of CaF, SrF, and BaF and implications for laser-cooling

Hao, Y., Pašteka, L. F., Visscher, L., Aggarwal, P., Bethlem, H. L., Boeschoten, A., Borschevsky, A., Denis, M., Esajas, K., Hoekstra, S., Jungmann, K., Marshall, V. R., Meijknecht, T. B., Mooij, M. C., Timmermans, R. G. E., Touwen, A., Ubachs, W., Willmann, L., Yin, Y. & Zapara, A., 21 Jul 2019, In : Journal of Chemical Physics. 151, 3, p. 1-17 17 p., 034302.

Research output: Contribution to JournalArticleAcademicpeer-review