V.V. Ilyushin, P. Jansen, M.G. Kozlov, S.A. Levshakov, I. Kleiner, W. Ubachs, H.L. Bethlem
Sensitivity to a possible variation of the Proton-to-Electron
Mass Ratio of Torsion-Wagging-Rotation Transitions in Methylamine (CH3NH2)
Submitted (2012)
M.A. Haddad, D. Zhao, H. Linnartz, W. Ubachs
Spin-orbit splitting and lifetime broadening in the A2D state of l-C5H
Submitted (2012)
J. Bagdonaite, M.T. Murphy, L. Kaper, W. Ubachs,
Constraint on a variation of the proton-to-electron mass ratio from H2 absorption towards quasar Q2348-011
Accepted Month. Not. Roy. Astron. Soc. (2011);
arXiv version
J.C.J. Koelemeij, D.W.E. Noom, D. de Jong, M.A. Haddad, W. Ubachs,
Observation of the v = 8 - v = 0 vibrational overtone in cold trapped HD+
Accepted Appl. Phys. B (2012); preprint; DOI 10.1007/s00340-011-4802-y
D. Zhao, H. Linnartz, W. Ubachs
The electronic spectrum of the Cs-C11H3 radical
J. Chem. Phys. 136, 054307 (2012);
Supplementary material
D.Z. Kandula, C. Gohle, T.J. Pinkert, W. Ubachs, K.S.E. Eikema
XUV frequency comb metrology on the ground state of helium
Phys. Rev. A84, 062512 (2011);
A.N. Heays, G. Dickenson, E.J. Salumbides, N. de Oliveira, D. Joyeux, L. Nahon,
B.R. Lewis, W. Ubachs,
High-resolution Fourier-transform XUV photoabsorption spectroscopy study of 14N15N
J. Chem. Phys. 135, 244301 (2011)
P. Jansen, I. Kleiner, L.-H. Xu, W. Ubachs, H.L. Bethlem
Sensitivity of transitions in internal rotor molecules to a possible variation of the proton-to-electron mass ratio
Phys. Rev. A 84, 062505 (2011)
G. Dickenson, T. Ivanov, W. Ubachs, M. Roudjane, N. de Oliveira, D. Joyeux, L. Nahon,
W.U.L. Tchang-Brillet, M. Glass-Maujean, H. Schmoranzer, A. Knie, S. Kubler, A. Ehresmann,
VUV spectroscopic study of the D1Piu state of molecular deuterium
Mol. Phys. 109, 2693-2708 (2011)
A.J. de Nijs, E.J. Salumbides, K.S.E. Eikema, W. Ubachs, H.L. Bethlem
UV frequency metrology on CO (a3P);
Isotope effects and sensitivity to a variation of the proton-to-electron mass ratio
Phys. Rev. A 84, 052509 (2011)
J.A. King, M.T. Murphy, W. Ubachs, J.K. Webb,
New constraint on cosmological variation of the proton-to-electron mass ratio from Q0528-250
Monthly Not. Royal Astron. Soc. 417, 3010-3024 (2011)
Supplementary material
D. Zhao, M.A. Haddad, H. Linnartz, W. Ubachs
C6H and C6D: electronic spectra and Renner-Teller analysis
J. Chem. Phys. 135, 044307 (2011)
D. Zhao, M.A. Haddad, H. Linnartz, W. Ubachs
Structure determination of the non-linear hydrocarbon chains C9H3 and C11H3 by deuterium labeling
J. Chem. Phys. 135, 074201 (2011)
E.J. Salumbides, G. Dickenson, T.I. Ivanov, W. Ubachs
QED effects in molecules: test on rotational quantum states of H2
Phys. Rev. Lett. 107, 043005 (2011)
F. van Weerdenburg, M.T. Murphy, A.L. Malec, L. Kaper, W. Ubachs
First constraint on cosmological variation of the proton-to-electron mass ratio
from two independent telescopes
Phys. Rev. Lett. 106, 180802 (2011),
Supplementary material.
P. Jansen, L.-H. Xu, I. Kleiner, W. Ubachs, H.L. Bethlem
Methanol as a sensitive probe for spatial and temporal variations of the
proton-to-electron mass ratio
Phys. Rev. Lett. 106, 100801 (2011),
Supplementary material
D. Sprecher, Ch. Jungen, W. Ubachs, F. Merkt
Towards measuring the ionisation and dissociation energies
of molecular hydrogen with sub-MHz accuracy
Faraday Discussions 150, 51-70 (2011)
W. Ubachs, J. Bagdonaite, M.T. Murphy, R. Buning, L. Kaper
Search for cosmological mu variation from high-redshift H2 absorption; a status report
Astrophys. Space Science (2011);
C. Martins and P. Molaro (eds.), From Varying Couplings to Fundamental Physics, p125
T.I. Ivanov, C.A. de Lange, W. Ubachs,
Spectral identification of diffuse resonances in H2 above the n=2 dissociation limit
J. Chem. Phys. 134, 054309 (2011)
E.J. Salumbides, V. Maslinskas, I.M. Dildar, A.L. Wolf, E.-J. van Duijn, K.S.E. Eikema, W. Ubachs
High precision frequency measurement of the 423 nm Ca I line
Phys. Rev. A83, 012502 (2011)
F. Hamann, N. Kanekar, J.X. Prochaska, M.T. Murphy, S.L. Ellison, A.L. Malec, N. Milutinovic,
W. Ubachs,
A high-velocity narrow absorption line outflow in the quasar J212329.6-005052.9
Month. Not. Roy. Astron. Soc. 410, 1957-1974 (2011)
A.L. Wolf, J. Morgenweg, J.C.J. Koelemeij, S.A. van den Berg, W. Ubachs, K.S.E. Eikema
Direct frequency-comb spectroscopy of a dipole-forbidden clock transition
in trapped 40Ca+ ions
Optics Lett. 36, 49-51 (2011)
D. Zhao, N. Wehres, H. Linnartz, W. Ubachs
Electronic spectra and structure of the non-linear carbon chain C9H3
Chem. Phys. Lett. 501, 232-237 (2011)
K.S.E. Eikema, W. Ubachs,
Precision Laser spectroscopy in the Extreme Ultraviolet
Handbook of high resolution spectroscopy, Eds. M. Quack and F. Merkt
John Wiley & Sons, 2010, ISBN: 978-0-470-06653-9, Page 1373-1413
D.Z. Kandula, C. Gohle, T.J. Pinkert, W. Ubachs, K.S.E. Eikema
Extreme ultraviolet frequency comb metrology
Phys. Rev. Lett. 105 (2010) 063001.
See also
Physics Synopsis
T. van Dijk, H.F. Schouten, W. Ubachs, T.D. Visser
Observation of linear, nonlinear and singular behavior of the Pancharatnam-Berry phase
SPIE Proceedings (Complex Light and Optical Forces IV Book Series) 7613, 76130E (2010)
G. Dickenson, T. Ivanov, M. Roudjane, N. de Oliveira, D. Joyeux, L. Nahon,
L. Tchang-Brillet, M. Glass-Maujean, I. Haar, A. Ehresmann, W. Ubachs
Synchrotron VUV radiation studies of the D1Piu state of H2
J. Chem. Phys. 133, 144317 (2010)
N. Wehres, D. Zhao, W. Ubachs, H. Linnartz
Rotationally resolved A3Su--
X3Su- spectrum of HC7H
Chem. Phys. Lett. 497, 30-32 (2010)
M.O. Vieitez, E.-J. van Duijn, W. Ubachs, B. Witschas, A. Meijer,
A.S. de Wijn, N. Dam, W. van de Water,
Coherent and spontaneous Rayleigh-Brillouin scattering in molecular gases and
gas mixtures
Phys. Rev. A 82, 043836 (2010)
W. Ubachs,
50 jaar Laser (in Dutch)
Ned. Tijdschr. v. Natuurkunde 76 (2010) 172-174.
W. Ubachs,
Maiman gemangeld (in Dutch)
Ned. Tijdschr. v. Natuurkunde 76 (2010) 184-185.
D. Sprecher, J. Liu, Ch. Jungen, W. Ubachs, F. Merkt
Determination of ionization and dissociation energies of HD
J. Chem. Phys. 133, 111102 (2010)
This paper is one of the
JCP Editors choice papers of 2010
J. Tumlinson, A.L. Malec, R.F. Carswell, M.T. Murphy, R. Buning, N. Milutinovic,
S.L. Ellison, J.X. Prochaska, R.A. Jorgenson, W. Ubachs, A.M. Wolfe
Cosmological concordance or chemical coincidence ?
Deuterated molecular hydrogen abundances at high redshift
Astroph. J. Lett. 718, L156 (2010)
B. Witschas, M.O. Vieitez, E.-J. van Duijn, O. Reitebuch, W. van de Water, W. Ubachs
Spontaneous Rayleigh-Brillouin scattering of ultraviolet light in nitrogen,
dry and moist air
Appl. Optics 49 (2010) 4217-4227
J. Liu, D. Sprecher, Ch. Jungen, W. Ubachs, F. Merkt
Determination of ionization and dissociation energies of the deuterium molecule (D2)
J. Chem. Phys. 132 (2010) 154301
O. Le Rille, A.-G. Straume, O. Vieitez, W. Ubachs, B. Witschas, G.-J. Marseille,
J. de Kloe, A. Stoffelen, K. Houchi, H. Körnich, H. Schyberg
ESA's wind Lidar mission ADM-AEOLUS; on-going scientific activities
related to calibration, retrieval and instrument operation
25th International Lidar Radar Conference Proceedings
T. van Dijk, H.F. Schouten, W. Ubachs, T.D. Visser
The Pancharatnam-Berry phase for non-cyclic polarization changes
Optics Express 18, 10796-10804 (2010)
T.I. Ivanov, G.D. Dickenson, M. Roudjane, N. de Oliveira, D. Joyeux,
L. Nahon, W.U.L. Tchang-Brillet, W. Ubachs,
Fourier-transform spectroscopy of HD in the vacuum ultraviolet at lambda = 87-112 nm
Mol. Phys. 108, 771-786 (2010)
D. Bailly, E.J. Salumbides, M. Vervloet, W. Ubachs,
Accurate level energies in the EF1S+g,
GK1S+g, H1S+g,
B1S+u, C1Pu,
B'1S+u, D1Pu,
I1Pg, J1Dg states of H2
Mol. Phys. 108, 827-846 (2010)
Supplementary Material
A.L. Malec, R. Buning, M.T. Murphy, N. Milutinovic, S.L. Ellison,
J.X. Prochaska, L. Kaper, J. Tumlinson, R.F. Carswell, W. Ubachs
Keck telescope constraint on cosmological variation of the proton-to-electron
mass ratio
Monthly Not. Royal Astron. Society, 403 (2010) 1541-1555
Additional information:
J2123 spectra
and Molecular data
for hydrogen
C. Gohle, D.Z. Kandula, T. Pinkert, W. Ubachs, K.S.E. Eikema,
XUV frequency comb spectroscopy
Proceedings of the XIX International Conference on Laser Spectroscopy (2009)
Eds: H. Katori, K. Nakagawa, Hitoki Yoneda, World Scientific 2010, p 171-180
D.Z. Kandula, A. Renault, C. Gohle, A.L. Wolf, S. Witte, W. Hogervorst, W. Ubachs, K.S.E. Eikema
Ultrafast double pulse parametric amplification for precision Ramsey metrology
Ultrafast Phenomena XVI. Eds: P. Corkum, S. Silvestri, K.A. Nelson, E. Riedle, R.W. Schoenlein
Springer Series in Chem. Phys. 92, 846-848 (2009)
A.L. Wolf, S.A. Van den Berg, C. Gohle, E.J. Salumbides, W. Ubachs, K.S.E. Eikema
Frequency comb spectroscopy on calcium ions in a linear Paul trap
Ultrafast Phenomena XVI. Eds: P. Corkum, S. Silvestri, K.A. Nelson, E. Riedle, R.W. Schoenlein
Springer Series in Chem. Phys. 92, 852-854 (2009)
W. Ubachs, E.-J. van Duijn, M.O. Vieitez, W. van de Water, N. Dam, J.J. ter Meulen, A.S. Meijer,
J. de Kloe, A. Stoffelen, E.A.A. Aben,
A Spontaneous Rayleigh-Brillouin scattering experiment for the characterization of
atmospheric Lidar backscatter
ESA report, AO/1-5467/07/NL/HE (2009).
A.L. Malec, R. Buning, M.T. Murphy, N. Milutinovic, S.L. Ellison,
J.X. Prochaska, L. Kaper, J. Tumlinson, R.F. Carswell, W. Ubachs
New limit on a varying proton-to-electron mass ratio from high resolution
optical quasar spectra
Mem. Soc. Astron. Italiana 80, 882 (2009)
M.O. Vieitez, T.I. Ivanov, E.Reinhold, C.A. de Lange, W. Ubachs,
Spectroscopic observation and characterization of H+H- heavy Rydberg states
J. Phys. Chem. A 113 (2009) 13237-13245
R. Haselberg, L. van der Sneppen, F. Ariese, W. Ubachs, C. Gooijer,
G.J. de Jong, G.W. Somsen
Effectiveness of charged non-covalent polymer coatings against protein adsorption to silica surfaces
studied by evanescent-wave cavity ring-down spectroscopy and capillary electrophoresis
Anal. Chem. 81 (2009) 10172-10178
M.J.R. Heck, E. Salumbides, A. Renault, E.A.J.M. Bente, Y.-S. Oei, M.K. Smit, R. Notzel,
R. van Veldhoven,
K.S.E. Eikema, W. Ubachs,
Analysis of hybrid mode-locking of two-section quantum dot lasers operating at 1.5 micron
Optics express 17, 18063 (2009)
J. Liu, E.J. Salumbides, U. Hollenstein, J.C.J. Koelemeij, K.S.E. Eikema, W. Ubachs, F. Merkt,
Determination of ionization and dissociation energies of the hydrogen molecule
J. Chem. Phys. 130 (2009) 174306
D. Ityaksov, S. Stolte, H. Linnartz, W. Ubachs,
Rotational analysis of the A2S+ (v=1,2) - X2P (v=0)
electronic bands of 15N18O
J. Mol. Spectr. 255 (2009) 139-143
L. van der Sneppen, F. Ariese, C. Gooijer, W. Ubachs,
Liquid-Phase and Evanescent Wave Ring-Down spectroscopy in analytical chemistry
Annual Review of Analytical Chemistry 2 (2009) 13-35
M.O. Vieitez, T. Ivanov, E. Reinhold, C.A. de Lange, W. Ubachs,
Een Zwaar Bohratoom
Ned. Tijdschr. v. Natuurkunde 75 (2009) 36-38.
L. van der Sneppen, C. Gooijer, W. Ubachs, F. Ariese,
Evanescent Wave Cavity Ring-Down detection of cytochrome c on surface-modified prisms
Sensors and Actuators B 139 (2009) 505-510
A.L. Wolf, S.A. van den Berg, W. Ubachs, K.S.E. Eikema,
Direct frequency comb spectroscopy of trapped ions
Phys. Rev. Lett. 102 (2009) 223901
M.J.R. Heck, A. Renault, E.A.J.M. Bente, Y.-S. Oei, M.K. Smit, K.S.E. Eikema, W. Ubachs,
A. Anantathanasarn, R. Notzel,
Passively mode-locked 4.6 GHz and 10.5 GHz quantum dot laser diodes
around 1.55 micron with large operating regime
IEEE Journal of Select. Top. in Quant. Electr. 15 (2009) 634-643
H.L. Bethlem, W. Ubachs,
Testing the time invariance of fundamental constants using microwave spectroscopy
on diatomic radicals
Including the
Discussion
Faraday Disc. 142, 25-36 (2009)
E.J. Salumbides, A. Khramov, W. Ubachs,
High-resolution 2+1 REMPI study of the a'' 1Sg+
state in N2
J. Phys. Chem. A 113 (2009) 2383-2386
L. van der Sneppen, C. Gooijer, W. Ubachs, F. Ariese,
Cavity Ring-Down spectroscopy in analytical chemistry
In: Cavity Ring-Down Spectroscopy; Techniques and Applications
Eds. G. Berden and R. Engeln, Blackwell Publishing (Wiley), 2009, p. 89-112
E.J. Salumbides, D. Bailly, A. Khramov, A.L. Wolf, K.S.E. Eikema, M. Vervloet, W. Ubachs,
Improved laboratory values of the H2 Lyman and Werner lines
for constraining time variation of the proton-to-electron mass ratio
Phys. Rev. Lett. 101, 223001 (2008)
M.O. Vieitez, T.I. Ivanov, E.Reinhold, C.A. de Lange, W. Ubachs,
Observation of a Rydberg series in H+H-:
A heavy Bohr atom
Phys. Rev. Lett. 101, 163001 (2008)
R. Flatscher, A. Cabral, M. Abreu, A.L. Verlaan, S. Witte, W. Ubachs
Absolute Long-distance measurements with (sub)-micrometer accuracy for formation flight applications
ESA-report, ESA study 20183/NL/HE (2008).
B.R. Lewis, K.G.H. Baldwin, A.N. Heays, S.T. Gibson, J.P. Sprengers, W. Ubachs,
M. Fujitake,
Structure and predissociation of the 3psu D3Su+
state of N2;
First extreme ultraviolet and new near-infrared observations with coupled-channels analysis
J. Chem. Phys. 129, 204303 (2008)
This paper also appeared in the
Virtual Journal of Ultrafast Science
D. Ityaksov, H. Linnartz, W. Ubachs,
Deep-UV Rayleigh Scattering of N2, CH4 and SF6
Mol. Phys. 106, 2471 - 2479 (2008)
J.N. Philippson, R.C. Shiell, E.Reinhold, W. Ubachs,
Observation of molecular hyperfine structure in the XUV: the HF C-X spectrum
J. Chem. Phys. 129, 174310 (2008)
B.R. Lewis, K.G.H. Baldwin, J.P. Sprengers, W. Ubachs, G. Stark, K. Yoshino,
Optical observation of C, F, and G3Pu states of N2
J. Chem. Phys. 129 (2008) 164305
L. van der Sneppen, C. Gooijer, W. Ubachs, F. Ariese,
Cavity Ring-Down spectroscopy in chemistry
In: Lasers in Chemistry; Ed. M. Lackner, Wiley-VCH (2008)
H.L. Bethlem, M. Kajita, B. Sartakov, G. Meijer, W. Ubachs,
Prospects for precision measurements on ammonia molecules in a molecular fountain
Eur. Phys. Journal Special Topics 163 (2008) 55-69
M. Roudjane, T.I. Ivanov, M.O. Vieitez, C.A. de Lange, W.U.L. Tchang-Brillet, W. Ubachs,
Extreme ultraviolet laser calibration of D2 Lyman and Werner transitions
Mol. Phys. 106, 1193-1197 (2008)
A.L. Wolf, S.A. van den Berg, Ch. Gohle, E.J. Salumbides, W. Ubachs, K.S.E. Eikema,
Frequency metrology on the 4s 2S1/2 - 4p 2P1/2
transition in 40Ca+
for comparison with quasar data
Phys. Rev. A 78, 032511 (2008)
T.I. Ivanov, E.J. Salumbides, M.O. Vieitez, P.C. Cacciani, C.A. de Lange, W. Ubachs,
Extreme ultraviolet laser metrology of O I transitions
Monthly Notices Roy. Astron. Society Letters 389, L4-L7 (2008)
T.I. Ivanov, M. Roudjane, M.O. Vieitez, C.A. de Lange, W.U.L. Tchang-Brillet, W. Ubachs,
On a variation of the proton-electron mass ratio
HD as a probe for detecting mass variation on a cosmological time
scale
Phys. Rev. Lett. 100, 093007 (2008)
D. Ityaksov, H. Linnartz, W. Ubachs,
Deep-UV absorption and Rayleigh scattering of carbon dioxide
Chem. Phys. Lett. 462, 31-34 (2008)
D.Z. Kandula, A. Renault, Ch. Gohle, A.L. Wolf, S. Witte, W. Hogervorst, W. Ubachs, K.S.E. Eikema,
Ultrafast double-pulse parametric amplification for precision Ramsey metrology
Opt. Express 16 (2008) 7071-7082
M.O. Vieitez, T.I. Ivanov, C.A. de Lange, W. Ubachs, A.N. Heays, B.R. Lewis, G. Stark,
Interactions of the 3ppu c1Pu(v=2) Rydberg-complex member in isotopic N2
J. Chem. Phys. 128 134313 (2008)
F. Brandi, F. Giammanco, W. Ubachs,
Plasma-dynamically induced frequency shifts in high-order harmonic generation in nitrogen
Laser Physics 18, 585-591 (2008)
M.O. Vieitez, T.I. Ivanov, W. Ubachs, B.R. Lewis, C.A. de Lange,
On the complexity of the absorption spectrum of molecular nitrogen
J. Molecular Liquids 141, 110-117 (2008)
E.J. Salumbides, K.S.E. Eikema, W. Ubachs, U. Hollenstein, H. Knoeckel,
E. Tiemann,
Improved potentials and Born-Oppenheimer corrections by new measurements
of transitions of 129I2 and 127I129I
in the B3Pu - X1Sg band system
Eur. Phys. Journ. D 47, 171-179 (2008)
L. van der Sneppen, J. B. Buijs, C. Gooijer, W. Ubachs, F. Ariese
Evanescent Wave Cavity Ring-Down spectroscopy for enhanced dectection
of surface binding under flow injection analysis
Applied Spectr. 62, 649-654 (2008)
T.I. Ivanov, M.O. Vieitez, C.A. de Lange, W. Ubachs,
Frequency calibration of B1Su+ -
X1Sg+ (6,0) Lyman lines in H2
for comparison with quasar data
J. Phys. B 41 (2008) 035702
S. Hannemann, E.-J. van Duijn, W. Ubachs,
A narrow-band injection-seeded pulsed titanium:sapphire oscillator-amplifier system
with on-line chirp analysis for high-resolution spectroscopy
Rev. Sci. Instrum. 78 (2007) 103102
W. Ubachs, R. Buning, K.S.E. Eikema, E. Reinhold,
On a possible variation of the proton-electron mass ratio;
H2 spectra in the line of sight of high-redshift quasars
and in the laboratory
J. Mol. Spectr. 241 (2007) 155-179
M.O. Vieitez, T.I. Ivanov, J.P. Sprengers, C.A. de Lange, W. Ubachs,
B.R. Lewis, G. Stark
Quantum-interference effects in the
o1Pu(v=1) - b1Pu(v=9)
Rydberg-valence complex of molecular nitrogen
Mol. Phys. 105 (2007) 1543-1557
S. Hannemann, E.J. Salumbides, W. Ubachs,
Reducing the first order Doppler shift in a Sagnac interferometer
Optics Lett. 32 (2007) 1381-1383
L. van der Sneppen, F. Ariese, C. Gooijer, W. Ubachs,
Cavity ring-down spectroscopy for detection in liquid chromatography
at UV wavelengths using standard cuvettes in a zero-degree geometry
J. Chromatogr. A 1148 (2007) 184-188
W. Ubachs, R. Buning, E.J. Salumbides, S. Hannemann, H.L. Bethlem,
D. Bailly, M. Vervloet, L. Kaper, M.T. Murphy
On a variation of the proton-electron mass ratio
Proceedings of the XVIII International Conference on Laser Spectroscopy 2007
World Scientific; Eds: L. Hollberg, J. Bergquist, M. Kasevich
E. Reinhold, R. Buning, U. Hollenstein, A. Ivanchik, P. Petitjean, W. Ubachs,
Indication of a cosmological variation of the proton-electron
mass ratio based on laboratory measurement and reanalysis of H2
spectra
Phys. Rev. Lett. 96 (2006) 151101
Supplementary Material to the paper:
EPAPS
W. Ubachs, R. Buning, E. Reinhold,
Is er toch variatie van Natuurconstanten ?
Ned. Tijdschr. v. Natuurk. 72 (2006) 184-185.
S. Hannemann, E.J. Salumbides, S. Witte,
R. Zinkstok, E.-J. van Duijn, K.S.E. Eikema, W. Ubachs,
Frequency metrology on the EF1S+g-
X1S+g transition in H2, HD and D2
Phys. Rev. A 74, 062514 (2006).
This paper also appeared in the
Virtual Journal of Ultrafast Science
W. Ubachs
Precision spectroscopy of H2 and a possible variation of
mp/me over cosmological time
AIP Conf. Prod. 869, 37 (2006).
E.J. Salumbides, S. Hannemann, K.S.E. Eikema, W. Ubachs,
Isotopically-resolved calibration of the 285-nm Mg I resonance line for comparison
with quasar absorptions
Mon. Notices Roy. Astron. Soc. 373 (2006) L41-L44
S. Witte, R. Th. Zinkstok, A.L. Wolf, W. Hogervorst, W. Ubachs, K.S.E. Eikema,
A source of 2 terawatt, 2.7 cycle laser pulses based on noncollinear
optical parametric chirped amplification
Opt. Express 14, 8168-8177 (2006)
This paper also appeared in the
Virtual Journal of Ultrafast Science
S. Hannemann, E.J. Salumbides, S. Witte, R. Zinkstok,
E.-J. van Duijn, K.S.E. Eikema, W. Ubachs,
Frequency metrology on the Mg 3s2 - 3s4p line for comparison with quasar data
Phys. Rev. A 74, 012505 (2006).
R.T. Zinkstok, S. Witte, W. Ubachs, W. Hogervorst, K.S.E. Eikema,
Frequency comb metrology laser spectroscopy in the vacuum ultraviolet
Phys. Rev. A 73, 061801(R) (2006)
This paper also appeared in the
Virtual Journal of Ultrafast Science
L. van der Sneppen, A.E. Wiskerke, F. Ariese, C. Gooijer, W. Ubachs,
Cavity ring-down spectroscopy for detection in liquid chromatography:
extension to tunable sources and UV wavelengths
Appl. Spectr. 60, 931-935 (2006)
E.J. Salumbides, K.S.E. Eikema, W. Ubachs, U. Hollenstein, H. Knoeckel,
E. Tiemann,
The hyperfine structure of 129I2 and 127I129I
in the B3Pu - X1Sg band system
Mol. Phys. 104, 2641-2652 (2006)
O. Naumenko, M. Sneep, M. Tanaka, S.V. Shirin, W. Ubachs, J. Tennyson,
Cavity ring-down spectroscopy of H217O in the range 16570 -17125 cm-1
Supplementary Material
J. Mol. Spectr. 237, 63-69 (2006)
U. Hollenstein, E. Reinhold, C.A. de Lange, W. Ubachs,
High resolution VUV-laser spectroscopic study of the
B1S(u)+ (v') -
X1S(g)+ (0), v'=0-2 Lyman bands
in H2 and HD
J. Phys. B. 39 (2006) L195-L201
F. Brandi,
F. Giammanco,
W. Ubachs
Spectral redshift in harmonic generation from plasma dynamics in the laser focus
Phys. Rev. Lett. 96 (2006) 123904
This paper also appeared in the
Virtual Journal of Ultrafast Science
L. van der Sneppen, A.E. Wiskerke, F. Ariese, C. Gooijer, W. Ubachs,
Improving absorbance detection in Liquid Chromatography with Cavity Ring-Down spectroscopy
Anal. Chim. Acta 558 (2006) 2-6
J.P. Sprengers,
W. Ubachs,
Lifetimes and transition frequencies of several singlet ungerade states
in N2 between 100000 - 106000 cm-1
J. Mol. Spectr. 235 (2006) 176-180
M. Sneep, D. Ityaksov, I. Aben, H. Linnartz, W. Ubachs,
Temperature dependent cross sections of O2-O2
collision-induced absorption resonances at 477 nm and 577 nm
J. of Quant. Spectr. Rad. Transfer, 98 (2006) 405-424
L. van der Sneppen, F. Ariese, C. Gooijer, A Wiskerke, W. Ubachs,
Cavity Ring-Down spectroscopy as a detector in liquid chromatography
In: Advances in Spectroscopy for Lasers and Sensing, Springer,
2006, Part 3, 540
R.C. Shiell, E. Reinhold, F. Magnus, W. Ubachs,
Control of diabatic vs. adiabatic field dissociation in a heavy Rydberg system
Phys. Rev. Lett. 95 (2005) 213002
This paper also appeared in the
Virtual Journal of Ultrafast Science
S. Witte, R.T. Zinkstok, W. Ubachs, W. Hogervorst, K.S.E. Eikema,
Deep ultraviolet quantum-interference metrology with ultrashort laser pulses
Science 307 (2005) 400-403
See also:
Perspective on this paper
B.R. Lewis, S.T. Gibson, J.P. Sprengers,
W. Ubachs,
A. Johansson, C.-G. Wahlstrom,
Lifetime and predissociation yield of 14N2
b1Pu(v=1) revisited: effects of rotation
J. Chem. Phys. 123 (2005) 236101
E.J. Salumbides, J.P. Sprengers, E. Reinhold, W. Ubachs,
High precision frequency calibration of N I lines in the XUV domain
J. Phys. B 38 (2005) L383-L387
S. Hannemann, G.R. Wu, E.-J. van Duijn, W. Ubachs, Ph. Cosby,
Pressure broadening and fine-structure dependent predissociation
in oxygen B3Su-, v=0
J. Chem. Phys. 123, 174318 (2005)
L. K. Cheng,
R. Koops,
A. Wielders,
W. Ubachs,
Alternative fringe sensor for DARWIN mission
Proc. SPIE Int. Soc. Opt. Eng. 5905, 59051E (2005),
link SPIE
L. K. Cheng,
R. Koops,
A. Wielders,
W. Ubachs,
Development of a fringe sensor based on 3x3 fiber optic coupler
for space interferometry
Proc. SPIE Int. Soc. Opt. Eng. 5855, 1004 (2005),
link SPIE
J.P. Sprengers,
E. Reinhold,
W. Ubachs,
K.G.H. Baldwin,
B.R. Lewis,
Optical observation of the 3ssg F3Pu
Rydberg state of N2
J. Chem. Phys. 123 (2005) 144315.
S. Hannemann, U. Hollenstein, E.-J. van Duijn, W. Ubachs,
Production of narrowband tunable XUV radiation by non-collinear resonance enhanced
four-wave mixing
Opt. Lett. 30 (2005) 1494-1496
S. Hannemann, E.-J. van Duijn, W. Ubachs,
Deep-UV high resolution cavity ring-down
spectroscopy of the Schumann-Runge bands in
16O2 and 18O2 at wavelengths 197 - 203 nm
J. Mol. Spectr. 232 (2005) 33-38
I. Labazan, E. Reinhold, W. Ubachs, V.V. Flambaum
Wavelength calibration of the C I line at 94.5 nm
for comparison with quasar data
Phys. Rev. A 71 (2005) 040501(R)
B. Bahnev, L. van der Sneppen, A.E. Wiskerke, F. Ariese, C. Gooijer, W. Ubachs,
Miniaturized Cavity Ring-Down detection in a liquid flow cell
Anal. Chem. 77 (2005) 1188-1191
I. Velchev, W. Ubachs,
Statistical properties of the Stokes signal in stimulated Brillouin
scattering pulse compressors
Phys. Rev. A 71 (2005) 043810
J.P. Sprengers,
W. Ubachs,
K.G.H. Baldwin
Isotopic variation of experimental lifetimes for the lowest 1Pu states in N2
J. Chem. Phys. 122 (2005) 144301
E. Reinhold, W. Ubachs,
Heavy Rydberg states
Mol. Phys. 103 (2005) 1329-1352
F. Giammanco,
A. Pirri,
F. Brandi,
M. Barkauskas,
W. Ubachs
Measurements of chirp-induced frequency shift
in high-harmonic generation in xenon
Laser Physics 15 (2005) 328-333
M. Barkauskas,
F. Brandi,
F. Giammanco,
D. Neshev,
A. Pirri,
W. Ubachs
A novel-type tunable and narrowband extreme ultraviolet radiation source
based on high-harmonic conversion of picosecond laser pulses
J. Electr. Spectr. Rel. Phen. 144-147 (2005) 1151-1155
W. Ubachs,
High resolution molecular physics studies using a laser-based tunable
XUV source at 107 resolving power
J. Electr. Spectr. Rel. Phen. 144-147 (2005) 97-101
M. Sneep, W. Ubachs,
Direct measurement of the Rayleigh scattering cross section in various gases
J. Quant. Spectr. Rad. Transfer 92 (2005) 293-310
W. Ubachs, E. Reinhold,
Highly accurate H2 Lyman and Werner band laboratory
measurements and an improved constraint on a cosmological
variation of the Proton-to-electron mass-ratio
Phys. Rev. Lett. 92 (2004) 101302
W. Ubachs, E. Reinhold,
Natuurconstanten, variabel of constant ?
Ned. Tijdschr. v. Natuurkunde 70 (2004) 208-211
M. Eidelsberg, F. Launay, K. Ito, T. Matsui, P.C. Hinnen, E. Reinhold, W. Ubachs, K.P. Huber,
Rydberg-valence interactions of CO, and spectroscopic evidence
characterizing the C'1S+ valence state
J. Chem. Phys. 121 (2004) 292-308
M. Sneep, S. Hannemann, E.-J. van Duijn, W. Ubachs,
Deep-UV Cavity Ring-Down Spectroscopy
Opt. Lett. 29 (2004) 1378-1380
J. Philip, J.P. Sprengers, Th. Pielage, C.A. de Lange, W. Ubachs, E. Reinhold
Highly accurate transition frequencies
in the H2 Lyman and Werner absorption bands
Can. J. Chem. 82 (2004) 713-722
M. Tanaka, M. Sneep, W. Ubachs, J. Tennyson,
Cavity-Ring-Down Spectroscopy of H218O in the 16570 -- 17120 cm-1 frequency range
J. Mol. Spectr. 226 (2004) 1-6
J.P. Sprengers, A. Johansson, A. L'Huillier, C.-G. Wahlstrom,
B.R. Lewis, W. Ubachs
Pump-probe lifetime measurements on singlet ungerade states in molecular nitrogen
Chem. Phys. Lett. 389 (2004) 348-351
J.P. Sprengers, W. Ubachs, A. Johansson, A. L'Huillier, C.-G. Wahlstrom,
R. Lang, B.R. Lewis, S.T. Gibson
Lifetime and
predissociation yield of 14N2 b1Piu(v=1)
J. Chem. Phys. 120 (2004) 8973-8978
This paper also appeared in the
Virtual Journal of Ultrafast Science
P. Cacciani, W. Ubachs,
High resolution study of Q-branches in the E1P - X1S+
band of 12C16O, 13C16O and 13C18O
J. Mol. Spectr. 225 (2004) 62-65
J. Philip, J.P. Sprengers, P. Cacciani, C.A. de Lange, W. Ubachs,
Frequency-mixing scheme for the production of tunable
narrowband XUV radiation (91-95 nm)
Appl. Phys. B 78 (2004) 737-743
E. Witkowicz, H. Linnartz, C.A. de Lange, W. Ubachs,
A. Sfounis, M. Massaouti, M. Velegrakis
Mass spectrometric and laser spectroscopic characterization of a
supersonic planar plasma expansion
Int. J. Mass Spectr. 232 (2004) 25-29
F. Brandi, D. Neshev, W. Ubachs
High-order harmonic generation yielding tunable
extreme-ultraviolet radiation of high spectral purity
Phys. Rev. Lett. 91 (2003) 163901
This paper also appeared in the
Virtual Journal of Ultrafast Science
G. Greetham, U. Hollenstein, R. Seiler, W. Ubachs, F. Merkt
High resolution VUV photoionization spectroscopy of HD
between the X2Sg+,
v+=0 and v+=1 thresholds
Phys. Chem. Chem. Phys. 5 (2003) 2528-2534
J.P. Sprengers, W. Ubachs, K.G.H. Baldwin, B.R. Lewis, W.-U.L. Tchang-Brillet
Extreme ultraviolet laser excitation of isotopic molecular nitrogen:
the dipole allowed spectrum of 15N2 and
14N15N
J. Chem. Phys. 119 (2003) 3160-3173
Additional material in EPAPS archive:
Data
F. Brandi, I. Velchev, D. Neshev, W. Hogervorst, W. Ubachs
A novel narrow-band wavelength-tunable laser system
delivering 300 ps high-energy pulses in the near-infrared
Rev. Sci. Instr. 74 (2003) 32-37
This paper also appeared in the
Virtual Journal of Ultrafast Science
J.C.J. Koelemeij, A. de Lange, W. Ubachs
Search for outer-well states above the ionization potential in H2
Chem. Phys. 287 (2003) 349-354
M. Sneep, W. Ubachs
Cavity-Ring down measurement of the O2-O2
collision-induced absorption resonance at 477 nm at sub-atmospheric pressures
J. Quant. Spectr. Rad. Transfer 78 (2003) 171-178
M. Sneep, W. Ubachs
Cavity-Ring down spectroscopy of O2-O2
collisional induced absorption
In: Weakly Interacting Molecular Pairs: Unconventional Absorbers of Radiation in the Atmosphere,
NATO Science series: IV: Earth and Environmental sciences Vol 27;
eds. C. Camy-Peret, A. Vigasin (2003)
E. Reinhold, W. Ubachs
Observation of coherent wave packets in a heavy Rydberg system
Phys. Rev. Lett. 88 (2002) 013001
F. Brandi, W. Hogervorst, W. Ubachs
High resolution vacuum-ultraviolet and ultraviolet
photionization spectroscopy of krypton
J. Phys. B 35 (2002) 1071-1084
P. Cacciani, F. Brandi, J.P. Sprengers, A. Johansson, A. L'Huillier,
C.-G. Wahlstrom, W. Ubachs
Predissociation of the 4pp L1P Rydberg state of carbon monoxide
Chem. Phys. 282 (2002) 63-73
G. Berden, G. Meijer, W. Ubachs
Spectroscopic Applications using Ring-Down cavities
In: Cavity Enhanced Spectroscopies; Eds: Van Zee, Looney, Academic Press (2002)
Experimental methods in the Physical Sciences Vol. 40 (2002) 47-82
A. de Lange, R. Lang, W.J. van der Zande, W. Ubachs
Highly excited states of gerade symmetry in molecular nitrogen
J. Chem. Phys. 116 (2002) 7893-7901
Th. Pielage, A. de Lange, F. Brandi, W. Ubachs
Bound energy levels at the n=2 dissociation threshold in HD
Chem. Phys. Lett. 366 (2002) 583-587
R. Lang, A.N. Maurellis, W.J. van der Zande, I. Aben, J. Landgraf, W. Ubachs
Forward modeling and retrieval of water vapor from GOME:
Treatment of narrow band absorption spectra
J. Geoph. Res. 107 D (2002) doi:10.1029/2001JD001453
A. de Lange, E. Reinhold, W. Ubachs
Phenomena of g-u symmetry-breakdown in HD
Intern. Reviews in Phys. Chemistry 21 (2002) 257-275
A. de Lange, E. Reinhold, W. Ubachs
Precision spectroscopy on some g symmetry states in H2
and determination of the ionization potential
Phys. Rev. A 65 (2002) 064501
K.S.E. Eikema, W. Ubachs, W. Vassen, W. Hogervorst
Precision spectroscopy on the Lyman-a transitions of H and He
In: "Laser Physics at the limit"; eds H. Figger, D. Meschede, C. Zimmerman
Springer Verlag, Berlin-Heidelberg 2002 p 107-113
E. Reinhold, W. Ubachs
Exotisch atoom met verzwaard elektron (in Dutch)
Ned. Tijdschr. v. Natuurkunde 68 (2002) 118-120
A. de Lange, W. Hogervorst, W. Ubachs, L. Wolniewicz
Double-well states of ungerade symmetry in H2;
first observation and ab initio calculation
Phys. Rev. Lett. 86 (2001) 2988-2991
H. Naus, I.H.M. van Stokkum, W. Hogervorst, W. Ubachs,
Quantitative analysis of decay transients applied to a
multi-mode pulsed cavity ring-down experiment
Applied Optics 40 (2001) 4416-4426
W. Ubachs, R. Lang, I. Velchev, W.-U L. Tchang-Brillet, A. Johansson,
Z.S. Li, V. Lokhnygin, C.-G. Wahlstrom
Lifetime measurements on the
c4' 1Su+, v=0,1 and 2
states of molecular nitrogen
Chem. Phys. 270 (2001) 215-225
F. Brandi, I. Velchev, W. Hogervorst, W. Ubachs
High-resolution VUV spectroscopy of Xe
Hyperfine splittings, Isotope shifts and isotope dependent Ionization energies
Phys. Rev. A 64 (2001) 032505
P. Cacciani, F. Brandi, I. Velchev, C. Lynga, C.-G. Wahlstrom, W. Ubachs
Isotope dependent predissociation in the C1S+, v=0
and v=1 states of CO
Eur. Phys. J. D 15 (2001) 47-56
I. Velchev, W. Ubachs
Higher-order stimulated Brillouin scattering with non-diffracting beams
Opt. Lett. 26 (2001) 530-532
G. Bazalgette Courreges-Lacoste, J.P. Sprengers, W. Ubachs, S. Stolte, H. Linnartz
The A2S+-X2P transition of CF starting from highly
excited vibrational states
J. Mol. Spectr. 205 (2001) 341-343
H. Naus, W. Ubachs, P.F. Levelt, O.L. Polyansky, N.F. Zobov, J. Tennyson
Cavity-Ring-Down spectroscopy on water vapour in the range 555-604 nm
J. Mol. Spectr. 205 (2001) 117-121
W. Ubachs
Laboratory studies of Long-range Excited states of H2
in: Molecular Hydrogen in Space, eds. F. Combes and G. Pineau des Forets,
Cambridge University Press, 2000, p 39-46
A. de Lange, E. Reinhold, W. Hogervorst, W. Ubachs
g/u symmetry breaking in HD at the n=2 dissociation limit
Can. J. Phys. 78 (2000) 567-578
W. Ubachs, I. Velchev, P. Cacciani
Predissociation in the E1P, v=1 state of
the six natural isotopomers of CO
J. Chem. Phys. 113 (2000) 547-560
E. Reinhold, W. Hogervorst, W. Ubachs
Tunneling and decay dynamics of H1Sg+
outer well states in hydrogen
J. Chem. Phys. 112 (2000) 10754-10760
S.C. Xu, R. van Dierendonck, W. Hogervorst, W. Ubachs
A dense grid of reference iodine lines for optical frequency
calibration in the range 595-655 nm
J. Mol. Spectr. 201 (2000) 256-266
W. van der Zande, W. Ubachs
Comment on: First observation of the rotational constants
for the homonuclear ion He2+
Phys. Rev. Lett. 84 (2000) 3212
W. Ubachs, I. Velchev, A. de Lange
Predissociation in b1Pu, v (v=1,4,5,6) levels of N2
J. Chem. Phys. 112 (2000) 5611-5616
H. Naus, W. Ubachs
Experimental Verification of Rayleigh-Scattering Cross sections
Opt. Lett. 25 (2000) 347-349
A.N. Maurellis, R. Lang, W. van der Zande, I. Aben, W. Ubachs
Precipitable water column retrieval from GOME data
Geoph. Res. Lett. 27 (2000) 903-906
I. Velchev, D. Neshev, W. Hogervorst, W. Ubachs
Pulse compression to the sub-phonon lifetime region
by half-cycle gain in transient stimulated Brillouin scattering
IEEE J. of Quant. Electr. 35 (1999) 1812-1816
C.R. Scheper, C.A. de Lange, E. Reinhold, A. de Lange, W. Ubachs
Dissociation of H2in the energy region at the
H(n=1) + H(n=3) dissociation threshold after (1+1') resonance-enhanced two photon
ionization via the B1Su+ state
Chem. Phys. Lett. 312 (1999) 131-138
A. de Lange, W. Ubachs
Observation of the y1Pg-c4'
1Su+
and k1Pg-c4'
1Su+ systems of N2
Chem. Phys. Lett. 310 (1999) 471
E. Reinhold, W. Hogervorst, W. Ubachs, L. Wolniewicz
Experimental and theoretical investigation of the
HH1Sg+ state in
H2, D2 and HD and the
B"B1Su+ state in HD
Phys. Rev. A60 (1999) 1258
I. Velchev, W. Hogervorst, W. Ubachs
Precision VUV spectroscopy of Argon I at 105 nm
J. Phys. B 17 (1999) L511
R. Teule, S. Stolte, W. Ubachs
Collision-induced E(0g+)-D(0u+)
state-to-state energy transfer in I2
Laser Chemistry 18 (1999) 111-128
H. Naus, W. Ubachs
Visible absorption bands of the (O2)2-collision
complex at pressures below 760 Torr
Applied Optics, 38 (1999) 3423-3428
H. Naus, K. Navaian, W. Ubachs
The gamma-band of 16O2, 16O17O,
17O2 and
18O2
Spectrochimica Acta 55, (1999) 1255
D. Neshev, I. Velchev, W. Majewski, W. Hogervorst, W. Ubachs
SBS Pulse compression to 200 ps in a compact single-cell setup
Appl. Phys. B68 (1999) 671
H. Naus, W. Ubachs
The b1Sg+ - X3Sg- (3,0) band of
16O2 and 18O2
J. Mol. Spectr. 193 (1999) 442-445
W. Ubachs, A. de Lange, E. Reinhold, W. Hogervorst,
XUV-multiple resonance excitation of long-range states in molecular hydrogen
In: Laser Spectroscopy XIV International Conference, World Scientific 1999
Eds: R. Blatt et al., p 23-32
R. Lang, A.N. Maurellis, W.J. van der Zande, I. Aben, P. Levelt, H. Naus, W. Ubachs
DOAS-OCM retrieval of Water Vapour from GOME and new CRD Spectroscopy
In: Proc. Eur. Space Agency, Symp. Atmospheric Measurements from Space
ESTEC, Document WPP-161 (1999) pp. 391-394
E. Reinhold, A. de Lange, W. Hogervorst, and W. Ubachs
Observation of the I' 1Pg outer well state in
H2 and D2
J. Chem. Phys. 109 (1998) 9772
E. Reinhold, W. Hogervorst, and W. Ubachs
Complete g-u symmetry breaking
in highly excited valence states of the HD molecule
Chem. Phys. Lett. 296 (1998) 411
H. Naus, S.J. van der Wiel, W. Ubachs
Cavity-ring-down spectroscopy on the
b1Sg+ -
X3Sg- (1,0)
band of oxygen isotopomers
J. Mol. Spectr. 192 (1998) 162-168
P.C. Hinnen, S. Stolte, W. Hogervorst, W. Ubachs
XUV-laser spectrometer for direct absorption measurements;
application to CO in the wavelength range 96-97 nm
Journ. of Opt. Soc. Am. B15 (1998) 2620-2625
P.P. Sorokin, J.H. Glownia, W. Ubachs
Current Status of the H2 diffuse interstellar bands theory
Faraday Discussion 109 (1998) 137-163
W. Hogervorst, K.S.E. Eikema, E. Reinhold, W. Ubachs
Precision XUV-laser spectroscopy of wwwic and molecular
two-electron systems
Nuclear Physics, A631 (1998) 353
P. Cacciani, W. Ubachs, P.C. Hinnen, C. Lynga, A. L'Huillier, C.-G. Wahlstrom
Lifetime measurements of the E1P, v=0 and v=1 states of
12C16O, 13C16O
and 13C18O
Astroph. J. Lett. 499 (1998) L223
S. Schiemann, W. Hogervorst, W. Ubachs
Fourier-transform-limited laser pulses tunable in wavelength and pulse duration (400-2000 ps)
IEEE J. of Quantum Electr. 34 (1998) 407-412
I. Velchev, R. van Dierendonck, W. Hogervorst, W. Ubachs
A dense grid of reference iodine lines for optical frequency calibration
in the range 571-596 nm
J. Mol. Spectr. 187 (1998) 21-27
E.J. Brinksma, Y.J. Meijer, I.S. McDermid, R.P. Cageao, J.B. Bergwerff,
D.P.J. Swart, W. Ubachs, W.A. Matthews, W. Hogervorst, J.W. Hovenier
First LIDAR observations of mesospheric hydroxyl
Geoph. Res. Lett. 25 (1998) 51-54
E.J. Brinksma, Y.J. Meijer, I.S. McDermid, R.P. Cageao, J.B. Bergwerff,
D.P.J. Swart, W. Ubachs, W.A. Matthews, W. Hogervorst, J.W. Hovenier
Correction: First LIDAR observations of mesospheric hydroxyl
Geoph. Res. Lett. 25 (1998) 521
H. Naus, A. de Lange, W. Ubachs
b1Sg+ -
X3Sg- (0,0)
band of oxygen isotopomers in relation to tests
of the symmetrization postulate in 16O2
Phys. Rev. A56 (1997) 4755
W. Ubachs, K.S.E. Eikema, W. Hogervorst, P.C. Cacciani
Narrow-band tunable extreme ultaviolet laser source for lifetime
measurements and precision spectroscopy
J. Opt. Soc. Am. B14 (1997) 2469
E. Reinhold, W. Hogervorst, W. Ubachs
Observation of a highly excited long-lived valence state in
H2
Phys. Rev. Lett. 78 (1997) 2543
S. Schiemann, W. Ubachs, W. Hogervorst
Efficient temporal compression of coherent nanosecond pulses in a compact generator-amplifier setup
IEEE J. of Quantum Electr. 33 (1997) 358
K.S.E. Eikema, W. Ubachs, W. Vassen, W. Hogervorst
Lamb shift measurement in the 1 1S ground state of helium
Phys. Rev. A55 (1997) 1866
W. Ubachs
Predissociative decay of the
c'41Su+,
v=0 state of molecular nitrogen
Chem. Phys. Lett. 268 (1997) 201
W. Ubachs, P.C. Hinnen, E. Reinhold
Observation of inter-Rydberg transitions in H2
coinciding with Diffuse Interstellar Bands
Astrophys. J. Lett. 476 (1997) L93
W. Hogervorst, K.S.E. Eikema, W. Vassen, W. Ubachs
QED and the ground state of Helium
In: Atomic Physics 15, H.B. van Linden van den Heuvell, J.T.M. Walraven, M.W. Reynolds eds.
(World Scientific, Singapore 1997) 169-179
H. Naus, A. de Lange, W. Ubachs, R. Engeln, G. Berden, G. Meijer
Cavity Ring Down Spectroscop aan zuurstof en zuurstofdimeer (in Dutch)
Van A tot Q 12 (1997) 39
W. Ubachs, I. Aben, W. van der Zande
Stikstof in de Atmosfeer (in Dutch)
Van A tot Q 12 (1997) 61
K.S.E. Eikema, W. Ubachs, W. Vassen, W. Hogervorst
Precision measurements in helium at 58 nm: Ground state
Lamb shift and the 1 1S - 2 1P transition isotope shift
Phys. Rev. Lett. 76, 1216 (1996)
R. van Leeuwen, W. Ubachs, P. Camus, W. Hogervorst
Electron correlation in three-body Coulomb states of barium
Phys. Rev. A54 (1996) R17
P.C. Hinnen, W. Ubachs
Further tests concerning the hypothesis of H2
as the carrier of the diffuse interstellar bands
Chem. Phys. Lett. 254, 32 (1996)
E. Reinhold, W. Hogervorst, W. Ubachs
High resolution laser spectroscopy of H2 at 86-90 nm
J. Mol. Spectr. 180 (1996) 156
R. van Leeuwen, M. Aymar, W. Ubachs, W. Hogervorst
Channel mixing in 4fng autoionizing series of barium
J. Phys. B29 (1996) 1007
P.C. Hinnen, W. Ubachs
On the hypothesis of H2 as the carrier of the diffuse interstellar bands
Chem. Phys. Lett. 240, 351-356 (1995)
P.C. Hinnen, S.E. Werners, W. Hogervorst, S. Stolte, W. Ubachs
XUV laser spectroscopy of HD at 92-98 nm
Phys. Rev. A52, 4425 (1995)
W. Ubachs, P.C. Hinnen, P. Hansen, S. Stolte, W. Hogervorst, P. Cacciani
Laser spectroscopic studies of the C1S+,
v=0 and v=1 states of CO
J. Mol. Spectr. 174 (1995) 388-396
P. Cacciani, W. Hogervorst, W. Ubachs
Accidental predissociation phenomena in the
E1P, v=0 and v=1 states of 12C16O and 13C16O
J. Chem. Phys. 102 (1995) 8308
R. van Leeuwen, W. Ubachs, W. Hogervorst, M. Aymar, E. Luc-Koenig
Interference effects in the autoionization of 4f7h and 6dni states of barium
Phys. Rev. A52 (1995) 4567
E. Luc-Koenig, M. Aymar, R. van Leeuwen, W. Ubachs, W. Hogervorst
Polarization effects in autoionization processes: the 5d5g states in barium
Phys. Rev. A52 (1995) 208
W. Ubachs
Resonant Ionization spectroscopy in the XUV spectral region
AIP Conf. Proc. 329 (1995) 283-288, Res. Ion. Spectroscopy 1994, AIP Press 1995
K.S.E. Eikema, W. Ubachs, W. Hogervorst
Isotope shift in the neon ground state by XUV-laser spectroscopy at 74 nm
Phys. Rev. A49 (1994) 803
K.S.E. Eikema, W. Hogervorst, W. Ubachs
Predissociation in carbon monoxide: dependence on rotational state, parity and isotope
Chem. Phys. 181 (1994) 217
W. Ubachs, K.S.E. Eikema, P.F. Levelt, W. Hogervorst,
M. Drabbels, W.L. Meerts, J.J. ter Meulen
Accurate determination of predissociation rates and transition frequencies for Carbon Monoxide
Astrophys. J. Lett. 427 (1994) L55
K.S.E. Eikema, W. Hogervorst, W. Ubachs
On the determination of a heterogeneous vs a homogeneous perturbation in a diatomic molecule:
the K1S+, v=0 state of 13C18O
J. Mol. Spectr. 163 (1994) 19-26
P.C. Hinnen, W. Hogervorst, S. Stolte, W. Ubachs
Sub-Doppler laser spectroscopy of H2 and D2 in the range 91-98 nm
Can. J. Phys. 72, 1032-1042 (1994)
P.C. Hinnen, W. Hogervorst, S. Stolte, W. Ubachs
High-resolution laser spectroscopy on H2 at 97-98 nm
Appl. Phys. B 59, 307-310 (1994)
R. van Leeuwen, W. Ubachs, W. Hogervorst
Autoionization of low-lying 5dng states in barium
J. of Phys. 27 (1994) 3891
K.S.E. Eikema, W. Ubachs, W. Vassen, W. Hogervorst
First laser excitation of the 4He 1 1S - 2 1P
resonance line at 58 nm
Phys. Rev. Lett. 71, 1690 (1993)
I. Aben, W. Ubachs, G. van der Zwan, W. Hogervorst
Linewidth effects in resonant CARS processes
Opt. Comm. 95 (1993) 97
I. Aben, W. Ubachs, G. van der Zwan, W. Hogervorst
Theory of rotational linestrengths for resonant four-wave-mixing
processes in gaseous media with application to CARS
Chem. Phys. 169 (1993) 113
I. Aben, W. Ubachs, G. van der Zwan, W. Hogervorst
Resonance CARS in Br2
Chem. Phys. Lett. 198 (1993) 149
W. Ubachs, K.S.E. Eikema, W. Hogervorst
Narrowband extreme ultraviolet radiation tunable in the range 90.5-95 nm:
application to spectroscopy of N2
Appl. Phys. B57 (1993) 411-416
W. Ubachs, I. Aben, J.B. Milan, G.J. Somsen, A.G. Stuiver, W. Hogervorst
Radiative and collisional relaxation of a single rovibrational quantum state of
I2: E(O+g), n=8, J=56
Chem. Phys. 174 (1993) 285
P.F. Levelt, K.S.E. Eikema, S. Stolte, W. Hogervorst, W. Ubachs
XUV-laser excitation of molecular fluorine
Chem. Phys. Lett. 210 (1993) 307
G. Kuik, R. van Leeuwen, R. de Graaf, W. Vassen, W. Ubachs, W. Hogervorst
Laser Spectroscopy of doubly-excited states in barium
Am. Inst. Phys. Conf. Proc. 275 (1993) 353-362
W. Ubachs
Predissociatie: Kortlevende eigentoestanden of Intramolekulaire dynamika
Van A tot Q, 5, Dec 1993, 2-7 (in Dutch)
P.F. Levelt, W. Ubachs
XUV-laser spectroscopy on the c4' 1Su+,
v=0 and c3 1Pu, v=0 Rydberg states of N2
Chem. Phys. 163 (1992) 263
P.F. Levelt, W. Ubachs, W. Hogervorst
Extreme ultraviolet laser spectroscopy on CO in the 91-100 nm range
J. Chem. Phys. 97 (1992) 7160
P.F. Levelt, W. Ubachs, W. Hogervorst
XUV laser spectroscopy on CO: isotope selective predissociation rates
J. de Physique II France 2 (1992) 801-812
R.J. de Graaff, W. Ubachs, W. Hogervorst
4fnf doubly-excited autoionizing series in barium
Phys. Rev. A45 (1992) 166
I. Aben, W. Ubachs, P. Levelt, G. van der Zwan, W. Hogervorst
Polarization effects in resonant four-wave mixing processes
Mol. Phys. 76 (1992) 591
I. Aben, W. Ubachs, G. van der Zwan, W. Hogervorst
Rotational band structures in resonance CARS of I2
In: Coherent Raman Spectrsocopy,
Eds: E.M. Castellucci, R. Righini, P. Foggi,
World Scientific (1992) 81-84
I. Aben, W. Ubachs, G. van der Zwan, W. Hogervorst
Multiple resonance enhanced four-wave mixing processes in I2
Phys. Rev. A76 (1991) 5881
M. Abutaleb, R.J. de Graaff, W. Ubachs, W. Hogervorst
The 5dnp and 5dnf J=1 autoionizing series of Ba in one-photon laser
excitation from the 6s2 1S0 ground state
J. Phys. B24 (1991) 3565-3573
M. Abutaleb, R.J. de Graaff, W. Ubachs, W. Hogervorst
6p1/2,3/2nf J=1-5 autoionizing series of Barium
Phys. Rev. A44 (1991) 4187
R.J. de Graaff, W. Ubachs, W. Hogervorst, and M. Abutaleb
Narrow 6p1/2,3/2np J=1 autoionizing Rydberg series in Barium
and their interaction with 6p3/2nf states
Phys. Rev. A42 (1990) 5473
W. Ubachs and J.J. ter Meulen
Comment on: Lifetime of the A2S+, v=0 state of SH
J. Chem. Phys. 92 (1990) 2121-2122
I. Aben, P. Levelt, W. Ubachs, W. Hogervorst
Resonance CARS in Br2 molecules and Br atoms
Inst. Phys. Conf. Series 114 (1990) 193-194
W. Ubachs, L.M. Tashiro, and R.N. Zare
Study of the N2 b1Pu state
via 1+1 multiphoton ionization
Chem. Phys. 130 (1989) 1
L.M. Tashiro, W. Ubachs, and R.N. Zare
The HF and DF B1S+-X1S+
and C1P-X1S+ band system studied by
1 XUV +1 UV resonance enhanced multiphoton ionization
J. Mol. Spectr. 138 (1989) 89
G. Meijer, W. Ubachs, J.J. ter Meulen, and A. Dymanus
High resolution Lamb-dip spectroscopy on OD and SiCl in a molecular beam
Chem. Phys. Lett. 139 (1987) 603
W. Ubachs, G. Meijer, J.J. ter Meulen, and A. Dymanus
High resolution laser spectroscopy on the
c1P - a1D transition in NH
J. Mol. Spectr. 115 (1986) 88
W. Ubachs, G. Meijer, J.J. ter Meulen, and A. Dymanus
Hyperfine structure and Lifetime of the
C2S+ state of CH
J. Chem. Phys. 84 (1986) 3032-3041
W. Ubachs, W. van Herpen, J.J. ter Meulen, and A. Dymanus
Hyperfine structure and L-doubling in the
A2D state of CH: observation of an internal hyperfine perturbation
J. Chem. Phys. 84 (1986) 6575-6580
J.J. ter Meulen, W. Ubachs, and A. Dymanus
Observation of rho-doublet transitions in OH (A2S+)
by UV-microwave double resonance in a molecular beam
Chem. Phys. Lett. 129 (1986) 533
W. Ubachs, A.P.J. van Deursen, A.R. de Vroomen, and A. Arko
Fermi surface measurements of UPd3
Solid. State Comm. 60 (1986) 7
W. Ubachs, J.J. ter Meulen, and A. Dymanus
High resolution laser spectroscopy on the
A3P - X3S- transition of NH
Can. J. Phys. 62 (1984) 1374-1391
W. Ubachs, J.J. ter Meulen, and A. Dymanus
High resolution molecular beam spectroscopy on the
A2S+, v=0 state of SH
Chem. Phys. Lett. 101 (1983) 1
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