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  • WMG Ubachs
Short survey

A testing time for antimatter

Ubachs, W., 4 Nov 2016, In : Science. 354, 6312, p. 546-547 2 p.

Research output: Contribution to JournalShort surveyAcademicpeer-review

Review article

Search for Varying Constants of Nature from Astronomical Observation of Molecules

Ubachs, W., Feb 2018, In : Space Science Reviews. 214, 1, p. 1-15 15 p., 3.

Research output: Contribution to JournalReview articleAcademicpeer-review

Open Access
Conference contribution

Cavitation-induced expansion dynamics of tin microdroplet target in EUV light sources

Kurilovich, D., Pinto, T., Schupp, R., Torretti, F., Scheers, J., Stodolna, A., Eikema, K. S., Witte, S., Ubachs, W., Hoekstra, R. & Versolato, O. O., Mar 2018, Compact EUV and X-ray Light Sources, EUVXRAY 2018. OSA - The Optical Society, Vol. Part F85-EUVXRAY 2018.

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

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

Direct frequency comb spectroscopy in trapped 40Ca + ions on a dipoleforbidden clock transition

Wolf, A. L., Morgenweg, J., Koelemeij, J. C. J., Van Den Berg, S. A., Ubachs, W. & Eikema, K. S. E., 2011, 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011. 5943528

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

Frequency comb metrology at PHz frequencies: Precision in the extreme ultraviolet

Gohle, C., Kandula, D. Z., Pinkert, T. J., Morgenweg, J., Barmes, I., Ubachs, W. & Eikema, K. S. E., 2011, 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011. 6050328

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

Frequency comb metrology in the extreme ultraviolet

Kandula, D. Z., Gohle, C., Pinkert, T. J., Morgenweg, J., Barmes, I., Ubachs, W. & Eikema, K. S. E., 2011, 2011 Conference on Lasers and Electro-Optics: Laser Science to Photonic Applications, CLEO 2011. 5950371

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

Physics of laser-produced plasma sources of extreme ultraviolet radiation

Versolato, O. O., Kurilovich, D., Torretti, F., Schupp, R., Scheers, J., Deuzeman, M. J., Bayerle, A., Hoekstra, R. & Ubachs, W., 1 Jan 2018, Compact EUV and X-ray Light Sources, EUVXRAY 2018. OSA - The Optical Society, Vol. Part F85-EUVXRAY 2018.

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

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

Search for cosmological μ-variation from high-redshift H2 absorption; a status report

Ubachs, W., Bagdonaite, J., Murphy, M. T., Buning, R. & Kaper, L., 2011, From Varying Couplings to Fundamental Physics - Proceedings of Symposium 1 of JENAM 2010. Kluwer Academic Publishers., p. 125-137 13 p.

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

Tests of fundamental physics using ramsey-comb spectroscopy on the hydrogen molecule

Roth, C., Dreissen, L. S., Grundeman, E. L., Krauth, J. J., Favier, M., Salumbides, E. J., Ubachs, W. & Eikema, K. S. E., 17 Oct 2019, 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019. Institute of Electrical and Electronics Engineers Inc., 8872740. (2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019).

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

Tests of fundamental physics using Ramsey-comb spectroscopy on the hydrogen molecule

Roth, C., Dreissen, L. S., Gründeman, E. L., Krauth, J. J., Favier, M., Salumbides, E. J., Ubachs, W. & Eikema, K. S. E., 1 Jan 2019, European Quantum Electronics Conference, EQEC_2019. OSA - The Optical Society, 2019-ed_2_1. (Optics InfoBase Conference Papers; vol. Part F143-EQEC 2019).

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

The pancharatnam-berry phase for non-cyclic polarization changes

Van Dijk, T., Schouten, H. F., Ubachs, W. & Visser, T. D., 2011, Frontiers in Optics, FiO 2011.

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

Widely tunable extreme ultraviolet frequency comb generation

Pinkert, T. J., Kandula, D. Z., Gohle, C., Morgenweg, J., Barmes, I., Ubachs, W. & Eikema, K. S. E., 2011, 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011. 5943518

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

Chapter

High-precision spectroscopy of the HD+ molecule at the 1-p.p.b. level

Biesheuvel, J., Karr, J. P., Hilico, L., Eikema, K. S. E., Ubachs, W. & Koelemeij, J. C. J., Jan 2018, Exploring the World with the Laser: Dedicated to Theodor Hänsch on his 75th Birthday. Cham: Springer International Publishing Switzerland, p. 267-307 41 p.

Research output: Chapter in Book / Report / Conference proceedingChapterAcademicpeer-review

Open Access

Precision measurements and test of molecular theory in highly excited vibrational states of H2 (Ν = 11)

Trivikram, T. M., Niu, M. L., Wcisło, P., Ubachs, W. & Salumbides, E. J., Jan 2018, Exploring the World with the Laser: Dedicated to Theodor Hänsch on his 75th Birthday. Cham: Springer International Publishing Switzerland, p. 679-700 22 p.

Research output: Chapter in Book / Report / Conference proceedingChapterAcademicpeer-review

Open Access

Search for cosmological mu variation form high-redshift H2 absorption; a status report

Ubachs, W. M. G., Bagdonaite, J., Murphy, M. T., Buning, R. & Kaper, L., 2011, From Varying Couplings to Fundamental Physics. Martins, C. & Molaro, P. (eds.). Berlin-Heidelberg: Springer, p. 125 (Astrophysics and Space Science Proceedings).

Research output: Chapter in Book / Report / Conference proceedingChapterAcademicpeer-review

File
87 Downloads (Pure)
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
File
153 Downloads (Pure)

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
174 Downloads (Pure)

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

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
139 Downloads (Pure)

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
74 Downloads (Pure)

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
143 Downloads (Pure)

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
File
129 Downloads (Pure)

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

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