Thomas C. Brunold and Hans U. Güdel
"Luminescence Spectroscopy"
in "Inorganic Electronic Structure and Spectroscopy, Vol. I", E. I. Solomon, A. B. P. Lever (eds.)
Wiley, New York 259-306 (1999)      Abstract           

Stefan R. Lüthi, Markus Pollnau, Hans U. Güdel and Markus P. Hehlen
Near-infrared to visible upconversion in Er³⁺-doped Cs₃Lu₂Cl₉, Cs₃Lu₂Br₉ and Cs₃Y₂I₉ excited at 1.54 mm
Phys. Rev. B 60, 162-178 (1999)      Abstract                 

Stefan R. Lüthi, Hans U. Güdel and Markus P. Hehlen
Influence of the chemical environment on the electronic structure and spectroscopic properties of Er³⁺ doped Cs₃Lu₂Cl₉, Cs₃Lu₂Br₉, and Cs₃Y₂I₉
J. Chem. Phys. 110, 12033-12043 (1999)      Abstract                 

N. Cavadini, W. Henggeler, A. Furrer, H.-U. Güdel, K. Krämer and H. Mutka
Magnetic excitations in the quantum spin system KCuCl₃
Eur. Phys. J. B 7, 519-522 (1999)      Abstract                 

D. Hernandez, F. Rodriguez, M. Moreno and H. U. Güdel
Pressure dependence of the crystal field spectrum of the NH₄MnCl₃ perovskite: Correlation between 10Dq, Ne and Nt, and the Mn-Cl distance in MnCl₆^4- complexes
Physica B 265, 186-190 (1999)      Abstract                 

Philip L. W. Tregenna-Piggott, Stephen P. Best, Hans U. Güdel, Høgni Weihe and Chick C. Wilson
Influence of the Mode of Water Coordination on the Electronic Structure of the [V(OH₂)₆]³⁺ Cation
J. Solid State Chem. 145, 460-470 (1999)      Abstract                 

Ralph Schenker, Høgni Weihe and H. U. Güdel
Double exchange in the charge-transfer states of [Cr₂(OH)₃(tmtame)₂]³⁺
Chem. Phys. Lett. 303, 229-234 (1999)      Abstract                 

Oliver S. Wenger, Daniel R. Gamelin, Hans U. Güdel, A.V. Butashin and Alexander A. Kaminskii
Site-selective optical spectroscopy and upconversion mechanisms of the new laser material BaLu₂F₈:Er³⁺
Phys. Rev. B 60, 5312-5320 (1999)      Abstract                 

K. W. Krämer, H. U. Güdel, B. Roessli, P. Fischer, A. Dönni, N. Wada, F. Fauth, M. T. Fernandez-Diaz and T. Hauss
Noncollinear two- and three-dimensional magnetic ordering in the honeycomb lattices of ErX₃ (X = Cl,Br,I)
Phys. Rev. B 60, 3724-3727 (1999)      Abstract                 

I. Mirebeau, M. Hennion, H. Casalta, H. Andres, H. U. Güdel, A. V. Irodova and A. Caneschi
Low-Energy Magnetic Excitations of the Mn₁₂-Acetate Spin Cluster Observed by Neutron Scattering
Phys. Rev. Lett. 83, 628-631 (1999)      Abstract                 

W. Henggeler, N. Cavadini, A. Furrer, H. U. Güdel, K. Krämer and H. Mutka
Magnetic excitations in the quantum spin system KCuCl₃
ILL Annual Report 98, 22-23 (1999)      Abstract                 

F. Rodriguez, D. Hernandez and H. U. Güdel
Double-excitation transitions in the perovskite NH₄MnCl₃ studied by pressure techniques
Phys. Rev. B 60, 10598-10601 (1999)      Abstract                 

B. Dorner, D. Petitgrand and H. U. Güdel
Minute splitting of magnetic excitations due to dipolar interactions in CsFeCl₃ and RbFeCl₃ observed with polarised neutrons
Physica B 267-268, 263-265 (1999)      Abstract                 

C. M. Combes, P. Dorenbos, C. W. E. van Eijk, K. W. Krämer and H. U. Güdel
Optical and scintillation properties of pure and Ce³⁺-doped Cs₂LiYCl₆ and Li₃YCl₆:Ce³⁺ crystals
J. Lumin. 82, 299-305 (1999)      Abstract                 

O. Guillot-Noel, J. C. van't Spijker, J. T. M. de Haas, P. Dorenbos, C. W. E. van Eijk, K. W. Krämer and H. U. Güdel
Scintillator Properties of RbGd₂Br₇:Ce. Advantages and Limitations.
IEEE Trans. Nucl. Sci. 46 (5), (1999)      Abstract                 

Juan M. Clemente-Juan, Hanspeter Andres, Juan J. Borras-Almenar, Eugenio Coronado, Hans U. Güdel, Michael Aebersold, Gordon Kearly, Herma Büttner and Markus Zolliker
Magnetic Excitations in Polyoxometalate Clusters observed by Inelastic Neutron Scattering: Evidence for Ferromagnetic Exchange Interactions and Spin Anisotropy in the Tetrameric Nickel(II) Cluster [Ni₄(H₂O)₂(PW₉O₃₄)₂]^10- and Comparison with the Magnetic Properties.
J. Am. Chem. Soc. 121, 10021-10027 (1999)      Abstract                 

Hanspeter Andres, Juan M. Clemente-Juan, Michael Aebersold, Hans U. Güdel, Eugenio Coronado, Herma Büttner, Gordon Kearly, Julio Melero and Ramon Burriel
Magnetic Excitations in Polyoxometalate Clusters Observed by Inelastic Neutron Scattering: Evidence for Anisotropic Ferromagnetic Exchange Interactions in the Tetrameric Cobalt(II) Cluster [Co₄(H₂O)₂(PW₉O₃₄)₂]^10-. Comparison with the Magnetic and Specific Heat Properties
J. Am. Chem. Soc. 121, 10028-10034 (1999)      Abstract                 

Daniel R. Gamelin and Hans U. Güdel
Spectroscopy and Dynamics of Re⁴⁺ Near-IR-to-Visible Luminescence Upconversion
Inorg. Chem. 38, 5154-5164 (1999)      Abstract                 

Markus Wermuth and Hans U. Güdel
Photon Avalanche in Cs₂ZrBr₆:Os⁴⁺
J. Am. Chem. Soc. 121, 10102-10111 (1999)      Abstract                 

Daniel R. Gamelin, Markus Wermuth and Hans U. Güdel
Up-conversion processes of 5d transition metal ions in crystals
J. Lumin. 83-84, 405-410 (1999)      Abstract                 

Ralph Schenker, Høgni Weihe and Hans U. Güdel
Exchange Interactions Derived from Electron Transfer Processes in [Cr₂(OH)₃(tmtame)₂](NO₃)₃
Inorg. Chem. 38, 5593-5601 (1999)      Abstract                 

O. Guillot-Noel, J. T. M. de Haas, P. Dorenbos, C. W. E. van Eijk, K. Krämer and H. U. Güdel
Optical and scintillation properties of cerium-doped LaCl₃, LuBr₃ and LuCl₃
J. Lumin. 85, 21-35 (1999)      Abstract                 

J. C. van 't Spijker, P. Dorenbos, C. W. E. van Eijk, K. Krämer and H. U. Güdel
Scintillation and luminescence properties of Ce³⁺ doped K₂LaCl₅
J. Lumin. 85, 1-10 (1999)      Abstract                 

Philip L. W. Tregenna-Piggott, Høgni Weihe, Jesper Bendix, Anne-Laure Barra and Hans-Ueli Güdel
High-Field, Multifrequency EPR Study of the Vanadium(III) Hexaaqua Cation
Inorg. Chem. 38, 5928-5929 (1999)      Abstract                 

O. Waldmann, J. Schülein, R. Koch, P. Müller, I. Bernt, R. W. Saalfrank, H. P. Andres, H. U. Güdel and P. Allenspach
Magnetic Anisotropy of Two Cyclic Hexanuclear Fe(III) Clusters Entrapping Alkaline Ions
Inorg. Chem. 38, 5879-5886 (1999)      Abstract                 

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