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  • W.M.G. Ubachs
Article

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

High precision frequency measurement of the 423 nm Ca I line

Salumbides, E. J., Maslinskas, V., Dildar, I. M., Wolf, A. L., van Duijn, E. J., Eikema, K. S. E. & Ubachs, W. M. G., 2011, In : Physical Review A. 83, p. 012502

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

High-precision laser spectroscopy of the CO A(1)Pi - X-1 Sigma(+) (2,0), (3,0), and (4,0) bands

Niu, M., Ramirez, F., Salumbides, E. J. & Ubachs, W. M. G., 2015, In : Journal of Chemical Physics. 142, 4, p. 044302 044302.

Research output: Contribution to JournalArticleAcademicpeer-review

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., 1 Jan 2017, In : Applied Physics B. Lasers and Optics. 123, 1, 23.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

High resolution Fourier-transform extreme ultraviolet photoabsorption spectroscopy of 14N15N

Heays, A. N., Dickenson, G. D., Salumbides, E. J., de Oliveira, N., Joyeux, D., Nahon, L., Lewis, B. R. & Ubachs, W. M. G., 2011, In : Journal of Chemical Physics. 135, 24, p. 244301

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

High-resolution Fourier-transform spectroscopy and deperturbation analysis of the A1Π(v = 1) level in 12C18O

Malicka, M. I., Ryzner, S., Heays, A. N., de Oliveira, N., Field, R. W., Ubachs, W. & Hakalla, R., 4 Aug 2020, In : Journal of Quantitative Spectroscopy and Radiative Transfer. 255, p. 1-16 16 p., 107243.

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

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

Ion distribution and ablation depth measurements of a fs-ps laser-irradiated solid tin target

Deuzeman, M. J., Stodolna, A. S., Leerssen, E. E. B., Antoncecchi, A., Spook, N., Kleijntjens, T., Versluis, J., Witte, S., Eikema, K. S. E., Ubachs, W., Hoekstra, R. & Versolato, O. O., 14 Mar 2017, In : Journal of Applied Physics. 121, 10, 103301.

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

Lamb-dips and Lamb-peaks in the saturation spectrum of HD

Diouf, M. L., Cozijn, F. M. J., Darquié, B., Salumbides, E. J. & Ubachs, W., 1 Oct 2019, In : Optics Letters. 44, 19, p. 4733-4736 4 p.

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

Lifetime measurements of the A 2 Π1/2 and A 2 Π3/2 states in BaF

NL-eEDM Collaboration, 12 Nov 2019, In : Physical Review A. 100, 5, p. 1-5 5 p., 052503.

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

Measuring the electric dipole moment of the electron in BaF

Aggarwal, P., Bethlem, H. L., Borschevsky, A., Denis, M., Esajas, K., Haase, P. A. B., Hao, Y., Hoekstra, S., Jungmann, K., Meijknecht, T. B., Mooij, M. C., Timmermans, R. G. E., Ubachs, W., Willmann, L. & Zapara, A., 20 Nov 2018, In : European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics. 72, 11, 197.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Methanol as a Sensitive Probe for Spatial and Temporal Variations of the Proton-to-Electron Mass Ratio

Jansen, P., Xu, L-H., Kleiner, I., Ubachs, W. M. G. & Bethlem, H. L., 2011, In : Physical Review Letters. 106, 10, p. 100801

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

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

Molecular Fountain

Cheng, C., van der Poel, A. P. P., Jansen, P., Quintero Perez, M., Wall, T. E., Ubachs, W. M. G. & Bethlem, H. L., 2016, In : Physical Review Letters. 117, 25, 5 p., 253201.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

New constraint on cosmological variation of the proton-to-electron mass ratio from Q0528-250

King, J. A., Murphy, M. T., Ubachs, W. M. G. & Webb, J. K., 2011, In : Monthly Notices of the Royal Astronomical Society. 417, p. 3010-3024 15 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

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

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

Optical spectroscopy of complex open 4d-shell ions Sn7+ - Sn10+

Torretti, F., Windberger, R. A. W., Ryabtsev, A., Dobrodey, S., Bekker, H., Ubachs, W., Hoekstra, R., Kahl, E. V., Berengut, J. C., Crespo López-Urrutia, J. R. & Versolato, O., 10 Apr 2017, In : Physical Review A. 95, 4, 042503.

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

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

Perturbations in the A1Π, v = 0 state of 12C18O investigated via complementary spectroscopic techniques

Trivikram, M., Hakalla, R., Heays, A. N., Niu, M., Scheidegger, S., Salumbides, E. J., de Oliveira, N., Field, R. W. & Ubachs, W., 4 Aug 2017, In : Molecular Physics. 115, 24, p. 3178-3191 14 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

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

Physics beyond the Standard Model from hydrogen spectroscopy

Ubachs, W. M. G., Koelemeij, J. C. J., Eikema, K. S. E. & Salumbides, E. J., 2016, In : Journal of Molecular Spectroscopy. 320, p. 1-12

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Plasma Propulsion of a Metallic Microdroplet and its Deformation upon Laser Impact

Kurilovich, D., Klein, A. L., Torretti, F., Lassise, A., Hoekstra, R., Ubachs, W. M. G., Gelderblom, H. & Versolato, O., 2016, In : Physical Review Applied. 6, 1, 014018.

Research output: Contribution to JournalArticleAcademicpeer-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
File

Power-law scaling of plasma pressure on laser-ablated tin microdroplets

Kurilovich, D., Basko, M. M., Kim, D. A., Torretti, F., Schupp, R., Visschers, J. C., Scheers, J., Hoekstra, R., Ubachs, W. & Versolato, O. O., 19 Jan 2018, In : Physics of Plasmas. 25, 1, p. 012709 10 p., 012709.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Precision measurement of the fundamental vibrational frequencies of tritium-bearing hydrogen molecules: T2, DT, HT

Lai, K., Hermann, V., Trivikram, T. M., Diouf, M., Schlösser, M., Ubachs, W. & Salumbides, E. J., 28 Apr 2020, In : Physical Chemistry Chemical Physics. 22, 16, p. 8973-8987 15 p.

Research output: Contribution to JournalArticleAcademicpeer-review

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

Trivikram, T. M., Niu, M. L., Wcisło, P., Ubachs, W. & Salumbides, E. J., 1 Dec 2016, In : Applied Physics B. Lasers and Optics. 122, 12, 294.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

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

Precision spectroscopy and comprehensive analysis of perturbations in the A 1 ∏(v = 0) state of 13 C 18 O

Hakalla, R., Trivikram, T. M., Heays, A. N., Salumbides, E. J., de Oliveira, N., Field, R. W. & Ubachs, W., 2 Jan 2019, In : Molecular Physics. 117, 1, p. 79-96 18 p.

Research output: Contribution to JournalArticleAcademicpeer-review

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
File

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

Probing QED and fundamental constants through laser spectroscopy of vibrational transitions in HD

Biesheuvel, J., Karr, J-P., Hilico, L., Eikema, K. S. E., Ubachs, W. M. G. & Koelemeij, J. C. J., 2016, In : Nature Communications. 7, 10385.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars

Bainbridge, M. B., Barstow, M. A., Reindl, N., Tchang-Brillet, W. -U. L., Ayres, T. R., Webb, J. K., Barrow, J. D., Hu, J., Holberg, J. B., Preval, S. P., Ubachs, W., Dzuba, V. A., Flambaum, V. V., Dumont, V. & Berengut, J. C., Jun 2017, In : UNIVERSE. 3, 2, 32.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Prominent radiative contributions from multiply-excited states in laser-produced tin plasma for nanolithography

Torretti, F., Sheil, J., Schupp, R., Basko, M. M., Bayraktar, M., Meijer, R. A., Witte, S., Ubachs, W., Hoekstra, R., Versolato, O. O., Neukirch, A. J. & Colgan, J., 11 May 2020, In : Nature Communications. 11, 1, p. 1-8 8 p., 2334.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

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

QED Effects in Molecules: Test on Rotational Quantum States of H(2)

Salumbides, E. J., Dickenson, G. D., Ivanov, T. I. & Ubachs, W. M. G., 2011, In : Physical Review Letters. 107, 4, p. 043005

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File

Radiation transport and scaling of optical depth in Nd:YAG laser-produced microdroplet-tin plasma

Schupp, R., Torretti, F., Meijer, R. A., Bayraktar, M., Sheil, J., Scheers, J., Kurilovich, D., Bayerle, A., Schafgans, A. A., Purvis, M., Eikema, K. S. E., Witte, S., Ubachs, W., Hoekstra, R. & Versolato, O. O., 19 Sep 2019, In : Applied Physics Letters. 115, 12, p. 1-5 5 p., 124101.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

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 light scattering spectra of CO2 from molecular dynamics

Jamali, S. H., De Groen, M., Moultos, O. A., Hartkamp, R., Vlugt, T. J. H., Ubachs, W. & Van De Water, W., 14 Aug 2019, In : Journal of Chemical Physics. 151, 6, p. 1-8 8 p., 064201.

Research output: Contribution to JournalArticleAcademicpeer-review

Rayleigh–Brillouin light scattering spectroscopy of nitrous oxide (N2O)

Wang, Y., Liang, K., van de Water, W., Marques, W. & Ubachs, W., Feb 2018, In : Journal of Quantitative Spectroscopy and Radiative Transfer. 206, p. 63-69 7 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Rayleigh-Brillouin Scattering in Binary-Gas Mixtures

Gu, Z., Ubachs, W. M. G., Marques, W. & van der Water, W., 2015, In : Physical Review Letters. 114, 24, p. 243902 243902.

Research output: Contribution to JournalArticleAcademicpeer-review

Rayleigh-Brillouin scattering in SF6 in the kinetic regime

Wang, Y., Yu, Y., Liang, K., Marques, W., van de Water, W. & Ubachs, W., 1 Feb 2017, In : Chemical Physics Letters. 669, p. 137-142 6 p.

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

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

Relativistic and QED Effects in the Fundamental Vibration of T2

Madhu Trivikram, T., Schlösser, M., Ubachs, W. & Salumbides, E. J., 16 Apr 2018, In : Physical Review Letters. 120, 16, p. 1-5 5 p., 163002.

Research output: Contribution to JournalArticleAcademicpeer-review