Oliver S. Wenger and Hans U. Güdel
Photon Upconversion Properties of Ni²⁺ in Magnetic and Nonmagnetic Chloride Host Lattices
Inorg. Chem. 40, 157-164 (2001)      Abstract                 

Markus Wermuth and Hans U. Güdel
Photon avalanche in Cs₂ZrCl₆: Os⁴⁺
J. Chem. Phys. 114, 1393-1404 (2001)      Abstract                 

Daniel R. Gamelin and Hans U. Güdel
Upconversion Processes in Transition Metal and Rare Earth Metal Systems
in "Transition Metal and Rare Earth Compounds. - Excited States, Transitions, Interactions II",
Hartmut Yersin (ed.)
Topics in Current Chemistry 214, 1-56 (2001)      Abstract           

S. Heer, M. Wermuth, K. Krämer and H. U. Güdel
Upconversion excitation of Cr^{3+ 2}E emission in Y₃Ga₅O₁₂ codoped with Cr³⁺ and Yb³⁺
Chem. Phys. Lett. 334, 293-297 (2001)      Abstract                 

E. V. D. van Loef, P. Dorenbos, C. W. E. van Eijk, K. W. Krämer and H. U. Güdel
Optical and scintillation properties of pure and Ce³⁺ doped GdBr₃
Optics Communications 189, 297-304 (2001)      Abstract                 

N. Cavadini, G. Heigold, W. Henggeler, A. Furrer, H.-U. Güdel, K. Krämer and H. Mutka
Magnetic excitations in the quantum spin system TlCuCl₃
Phys. Rev. B 63, 172414/1-4 (2001)      Abstract                 

Hanspeter Andres, Juan M. Clemente-Juan, Reto Basler, Michael Aebersold, Hans-Ulrich Güdel, Juan J. Borrás-Almenar, A. Gaita, Eugenio Coronado, Herma Büttner and Stefan Janssen
Magnetic Polyoxometalates: Anisotropic Antiferro- and Ferromagnetic Exchange Interactions in the Pentameric Cobalt(II) Cluster [Co₃W(D₂O)₂(CoW₉O₃₄)₂]^12-.
A Magnetic and Inelastic Neutron Scattering Study
Inorg. Chem. 40, 1943-1950 (2001)      Abstract                 

Reto Basler, Philip L. W. Tregenna-Piggott, Hanspeter Andres, Christopher Dobe, Hans-Ulrich Güdel, Stefan Janssen and Garry J. McIntyre
Magnetic Excitations of CsMn(SO₄)₂·12D₂O, Measured by Inelastic Neutron Scattering
J. Am. Chem. Soc. 123, 3377-3378 (2001)      Abstract                 

Rafael Valiente, Oliver S. Wenger and Hans U. Güdel
Near-infrared-to-visible photon upconversion process induced by exchange interactions in Yb³⁺-doped RbMnCl₃
Phys. Rev. B 63, 165102/1-11 (2001)      Abstract                 

Oliver S. Wenger and Hans U. Güdel
Dual Luminescence and Excited-State Dynamics in Ti²⁺ Doped NaCl
J. Phys. Chem. B 105, 4181-4187 (2001)      Abstract                 

Oliver S. Wenger and Hans U. Güdel
Optical spectroscopy of CrCl₆^3- doped Cs₂NaScCl₆: Broadband near-infrared luminescence and Jahn-Teller effect
J. Chem. Phys. 114, 5832-5841 (2001)      Abstract                 

Ralph Schenker, Stephan Heer, Hans U. Güdel and Høgni Weihe
Optical Dimer Excitations and Exchange Parameters in (Et₄N)₃Cr₂F₉: First Observation of the ⁴A₂ ²A₁ Transition
Inorg. Chem. 40, 1482-1488 (2001)      Abstract                 

Mark Murrie, Helen Stoeckli-Evans and Hans U. Güdel
Assembly of Ni₇ and Ni₂₁ Molecular Clusters by Using Citric Acid
Angew. Chem. 113, 2011-2014 (2001)      Abstract                 
Angew. Chem. Int. Ed. 40, 1957-1960 (2001)      Abstract                 

Ralph Schenker, Høgni Weihe, Hans U. Güdel and Berthold Kersting
Exchange Pathways in Tris-m-thiolato Bridged [Cr₂L₃](CIO₄)₂CI·H₂O·MeOH (L = 2,6-Bis(aminomethyl)-4-tert-butyl-thiophenolate)
Inorg. Chem. 40, 3355-3362 (2001)      Abstract                 

Ralph Schenker, Høgni Weihe and Hans U. Güdel
Ferromagnetic Exchange in the Ground state and ⁴A₁ Exited State of (Et₄N)₃Fe₂F₉. A Magnetic and Optical Spectroscopic Study
Inorg. Chem. 40, 4319-4326 (2001)      Abstract                 

Oliver S. Wenger, Rafael Valiente and Hans U. Güdel
Influence of hydrostatic pressure on the Jahn-Teller effect in the ⁴T_2g excited state of CrCl₆^3- doped Cs₂NaScCl₆
J. Chem. Phys. 115, 3819-3826 (2001)      Abstract                 

Pascal Gerner, Oliver S. Wenger, Rafael Valiente and Hans U. Güdel
Green and Red Light Emission by Upconversion from the near-IR in Yb³⁺ Doped CsMnBr₃
Inorg. Chem. 40, 4534-4542 (2001)      Abstract                 

Markus Wermuth, Andrea Schmitz and Hans U. Güdel
Cooperative processes and upconversion in Cs₂NaYCl₆ codoped with Os⁴⁺ and Er³⁺
Phys. Rev. B 63, 245118/1-10 (2001)      Abstract                 

D. Schaniel, P. Allenspach, A. Furrer, K. Krämer and H. U. Güdel
Dimer Splitting of Er³⁺ in Cs₃Er₂Br₉
J. Alloys Comp. 323-324, 481-485 (2001)      Abstract                 

P. Dorenbos, C. W. E. von Eijk, H. U. Güdel, K. W. Krämer and E. V. D. van Loef
Scintillator crystals, method for making same, use thereof
Organisation Mondiale de la Propriété Intellectuelle,
Int. patent number WO 01/60944 A2, 23.08.2001      Abstract                 

P. Dorenbos, C. W. E. von Eijk, H. U. Güdel, K. W. Krämer and E. V. D. van Loef
Scintillator crystals, method for making same, use thereof
Organisation Mondiale de la Propriété Intellectuelle,
Int. patent number WO 01/60945 A2, 23.08.2001      Abstract                 

Markus Wermuth and Hans U. Güdel
Luminescence spectroscopy and NIR to VIS upconversion of Cs₂GeF₆: 2% Re⁴⁺
J. Phys.: Condens. Matter 13, 9583-9598 (2001)      Abstract                 

Karl W. Krämer, Ralph Schenker, Jürg Hauser, Høgni Weihe, Hans U. Güdel and Hans-Beat Bürgi
Crystal Structures of (Et₄N)₃M₂F₉ (M = V, Cr, Fe) determined by X-Ray Single-Crystal and Powder Diffraction: A New Structure Type for A₃M₂X₉ Compounds
Z. Anorg. Allg. Chem. 627, 2511-2516 (2001)      Abstract                 

Oliver S. Wenger and Hans U. Güdel
Chemical Tuning of the Photon Upconversion Properties in Ti²⁺-Doped Chloride Host Lattices
Inorg. Chem. 40, 5747-5753 (2001)      Abstract                 

E. V. D. van Loef, P. Dorenbos, C. W. E. van Eijk, K. Krämer and H. U. Güdel
Scintillation Properties of LaCl₃:Ce³⁺ Crystals: 
Fast, Efficient and High-Energy Resolution Scintillators
IEEE Trans. Nucl. Sci. 48, 341-345 (2001)      Abstract                 

E. V. D. van Loef, P. Dorenbos, C. W. E. van Eijk, K. Krämer and H. U. Güdel
High-energy-resolution scintillator: Ce³⁺ activated LaBr₃
Appl. Phys. Lett. 79, 1573-1575 (2001)      Abstract                 

C. W. E. van Eijk, P. Dorenbos, E. V. D. van Loef, K. Krämer and H. U. Güdel
Energy resolution of some new inorganic-scintillator gamma-ray detectors
Rad. Meas. 33, 521-525 (2001)      Abstract                 

P. L. W. Tregenna-Piggott and Hans-Ueli Güdel
Influence of Jahn-Teller Coupling on the Magnetic Properties of Transition Metal Complexes with Orbital Triplet Ground Terms: Magnetization and Electronic Raman Studies of the Titanium(III) Hexa-Aqua Cation
Inorg. Chem. 40, 5497-5506 (2001)      Abstract                 

Pascal Gerner, Stephan Heer, Christine Reinhard, Rafael Valiente, Oliver S. Wenger and Hans U. Güdel
New Light Emission Processes in Inorganic Materials
Chimia 55, 1021-1024 (2001)      Abstract           

Ralph Schenker, Myriam Triest, Christian Reber and Hans U. Güdel
Interference Dips in the Single-Crystal Absorption Spectrum of the Tri-m-fluoro-Bis(trifluorochromate(III)) Complex
Inorg. Chem. 40, 5787-5794 (2001)      Abstract                       

Oliver S. Wenger, Rafael Valiente and Hans U. Güdel
Optical spectroscopy of the Ni²⁺-doped layer perovskites Rb₂MCl₄ (M = Cd, Mn):
Effects of Ni²⁺-Mn²⁺ exchange interactions on the Ni²⁺ absorption, luminescence, and upconversion properties
Phys. Rev. B 64, 235116/1-8 (2001)      Abstract                 

N. Cavadini, W. Henggeler, A. Furrer, K. Krämer, H. U. Güdel, H. Mutka, A. Wildes and P. Vorderwisch
Quantum magnetic phase transition: a top-down approach
ILL Annual Report 2000, 12-13 (2001)      Abstract                 

N. Cavadini, A. Furrer, H.-U. Güdel, K. Krämer, H. Mutka and A. Wildes
Polarization Study of the Singlet-Triplet Modes in a Quantum Spin System
Proc. ILL millennium symposium, 145-146 (2001)      Abstract                 

Oliver S. Wenger, Claudia Wickleder, Karl W. Krämer and Hans U. Güdel
Upconversion in a divalent rare earth ion: optical absorption and luminescence spectroscopy of Tm²⁺ doped SrCl₂
J. Lumin. 94-95, 101-105 (2001)      Abstract                 

G. M. Salley, R. Valiente and H. U. Güdel
Luminescence upconversion mechanisms in Yb³⁺-Tb³⁺ systems
J. Lumin. 94-95, 305-309 (2001)      Abstract                 

C. Reinhard, P. Gerner, R. Valiente, O. S. Wenger and Hans U. Güdel
Upconversion phenomena in the Yb³⁺ doped transition metal compounds Rb₂MnCl₄ and CsMnBr₃
J. Lumin. 94-95, 331-335 (2001)      Abstract                 

S. Heer, M. Wermuth, K. Krämer, D. Ehrentraut and H. U. Güdel
Up-conversion excitation of sharp Cr^{3+ 2}E emission in YGG and YAG codoped with Cr³⁺ and Yb³⁺
J. Lumin. 94-95, 337-341 (2001)      Abstract                 

Markus Wermuth, Christian Reber and Hans U. Güdel
High-Resolution Luminescence and Absorption Spectroscopy of Cs₂GeF₆:Os⁴⁺
Inorg. Chem. 40, 3693-3703 (2001)      Abstract                 

Markus P. Hehlen, Mark L. F. Phillips, Nigel J. Cockroft and Hans U. Güdel
Upconversion Phosphors
in "Encyclopedia of Materials: Science and Technology", Volume 10
K. Buschow, R. W. Cahn, M. C. Flemings, B. Iischner, E. J. Kramer and S. Mahajan (eds.)
Pergamon Press, Elsevier Science, Oxford, ISBN 0-08-0431526, 9456-9458 (2001)      Abstract           

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