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  • WMG Ubachs
Article

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
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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

Proton-electron mass ratio from laser spectroscopy of HD+ at the part-per-trillion level

Patra, S., Germann, M., Karr, J. P., Haidar, M., Hilico, L., Korobov, V. I., Cozijn, F. M. J., Eikema, K. S. E., Ubachs, W. & Koelemeij, J. C. J., 4 Sep 2020, In : Science (New York, N.Y.). 369, 6508, p. 1238-1241 4 p.

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
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86 Downloads (Pure)

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

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

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

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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145 Downloads (Pure)

Sensitivity of transitions in internal rotor molecules to a possible variation of the proton-to-electron mass ratio

Jansen, P., Kleiner, I., Xu, L-H., Ubachs, W. M. G. & Bethlem, H. L., 2011, In : Physical Review A. 84, 6, 06250584.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
File
129 Downloads (Pure)

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
File
133 Downloads (Pure)

Short-wavelength out-of-band EUV emission from Sn laser-produced plasma

Torretti, F., Schupp, R., Kurilovich, D., Bayerle, A., Scheers, J., Ubachs, W., Hoekstra, R. & Versolato, O., 25 Jan 2018, In : Journal of Physics B. Atomic, Molecular and Optical Physics. 51, 045005, 045005.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Sn ion energy distributions of ns- A nd ps-laser produced plasmas

Bayerle, A., Deuzeman, M. J., Van Der Heijden, S., Kurilovich, D., De Faria Pinto, T. D., Stodolna, A., Witte, S., Eikema, K. S. E., Ubachs, W., Hoekstra, R. & Versolato, O. O., 4 Apr 2018, In : Plasma sources science & technology. 27, 4, p. 1-9 8 p., 045001.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Spectral characterization of an industrial EUV light source for nanolithography

Torretti, F., Liu, F., Bayraktar, M., Scheers, J., Bouza, Z., Ubachs, W., Hoekstra, R. & Versolato, O., 1 Jan 2020, In : Journal of Physics D. Applied Physics. 53, 5, p. 1-7 7 p., 055204.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Spectral identification of diffuse resonances in H2 above the n=2 dissociation limit

Ivanov, T. I., de Lange, C. A. & Ubachs, W. M. G., 2011, In : Journal of Chemical Physics. 134, p. 054309 10 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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163 Downloads (Pure)

Spectroscopic investigations of YAG-laser-driven microdroplet-tin plasma sources of extreme ultraviolet radiation for nanolithography

Versolato, O., Bayerle, A., Bayraktar, M., Behnke, L., Bekker, H., Bouza, Z., Colgan, J., Crespo López-Urrutia, J. R., Deuzeman, M. J., Hoekstra, R., Kurilovich, D., Liu, B., Meijer, R., Neukirch, A., Poirier, L., Rai, S., Ryabtsev, A., Scheers, J., Schupp, R., Sheil, J. & 3 others, Torretti, F., Ubachs, W. & Witte, S., 11 Jun 2020, In : Journal of Physics: Conference Series. 1412, 19, p. 1-1 1 p., 192006.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Spectroscopic-network-assisted precision spectroscopy and its application to water

Tóbiás, R., Furtenbacher, T., Simkó, I., Császár, A. G., Diouf, M. L., Cozijn, F. M. J., Staa, J. M. A., Salumbides, E. J. & Ubachs, W., 6 Apr 2020, In : Nature Communications. 11, 1, p. 12 1 p., 1708.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Spectroscopic Survey of Electronic Transitions of C6H, (C6H)-C-13, and C6D

Bacalla, X. L., Salumbides, E. J., Linnartz, H. V. J., Ubachs, W. M. G. & Zhao, D., 2016, In : Journal of Physical Chemistry A. 120, 32, p. 6402-6417

Research output: Contribution to JournalArticleAcademicpeer-review

Spectroscopy and perturbation analysis of the A1π (v=0) state of 13 C16 O

Niu, M. L., Hakalla, R., Trivikram, T. M., Heays, A. N., de Oliveira, N., Salumbides, E. J. & Ubachs, W., 1 Oct 2016, In : Molecular Physics. 114, 19, p. 2857-2867 11 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Spectroscopy and perturbation analysis of the CO A(1)pi -X-1 sigma(+) (2,0), (3,0) and (4,0) bands

Niu, M., Salumbides, E. J., Heays, A. N., de Oliveira, N., Field, R. W. & Ubachs, W. M. G., 2016, In : Molecular Physics. 114, 5, p. 627-636

Research output: Contribution to JournalArticleAcademicpeer-review

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

Structure determination of the non-linear hydrocarbon chains C9H3 and C11H3 by deuterium labeling

Zhao, D., Haddad, M. A., Linnartz, H. V. J. & Ubachs, W. M. G., 2011, In : Journal of Chemical Physics. 135, p. 074201 074201.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
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158 Downloads (Pure)

Sub-Doppler Frequency Metrology in HD for Tests of Fundamental Physics

Cozijn, F. M. J., Dupré, P., Salumbides, E. J., Eikema, K. S. E. & Ubachs, W., 13 Apr 2018, In : Physical Review Letters. 120, 15, p. 1-5 5 p., 153002.

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

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

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
File
132 Downloads (Pure)

Testing the variability of the proton-to-electron mass ratio from observations of methanol in the dark cloud core L1498

Dapra, M., Henkel, C., Levshakov, S. A., Menten, K. M., Muller, S., Bethlem, H. L., Leurini, S., Lapinov, A. V. & Ubachs, W., Dec 2017, In : Monthly Notices of the Royal Astronomical Society. 472, 4, p. 4434-4443 10 p.

Research output: Contribution to JournalArticleAcademicpeer-review

The 4051 Å comet band of 13C3

Haddad, M. A., Zhao, D., Linnartz, H. & Ubachs, W., Feb 2014, In : Proceedings of the International Astronomical Union. 9, S297, p. 297-299 3 p.

Research output: Contribution to JournalArticleAcademicpeer-review

The B-2 Pi-X-2 Pi electronic origin band of (C6H)-C-13

Bacalla, X. L., Zhao, D., Salumbides, E. J., Haddad, M. A., Linnartz, H. V. J. & Ubachs, W. M. G., 2015, In : Journal of Molecular Spectroscopy. 308, p. 41-44

Research output: Contribution to JournalArticleAcademicpeer-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 spectra of long carbon-chain (C2nH)-C-(13)/D molecules for (n=4-6)

Haddad, M. A., Zhao, D., Linnartz, H. V. J. & Ubachs, W. M. G., 2015, In : Molecular Physics. 113, 15-16 SI, p. 2063-2072

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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231 Downloads (Pure)

The excited J=0 (1)Sigma(+)(u) levels of D-2: Measurements and ab initio quantum defect study

Glass-Maujean, M., Jungen, C., Dickenson, G. D., de Oliveira, N. & Ubachs, W. M. G., 2016, In : Journal of Molecular Spectroscopy. 320, p. 33-38

Research output: Contribution to JournalArticleAcademicpeer-review

The inhomogeneous ISM toward PKS 1830-211 SW: A detailed view of molecular gas at a look-back time of 7.5 Gyr

Schulz, A., Henkel, C., Menten, K. M., Muller, S., Muders, D., Bagdonaite, J. & Ubachs, W. M. G., 2015, In : Astronomy and Astrophysics. 574, p. A108 A108.

Research output: Contribution to JournalArticleAcademicpeer-review

The Measurement of Tropospheric Temperature Profiles using Rayleigh-Brillouin Scattering: Results from Laboratory and Atmospheric Studies

Witschas, B., Reitebuch, O., Lemmerz, C., Kableka, P. G., Kondratyev, S., Gu, Z. & Ubachs, W., 7 Jun 2016, In : EPJ Web of Conferences. 119, 27004.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access