Thomas Hansen

Research interests

• Solid state chemistry of oxides: structure, phase transitions and chemical kinetics, high temperature synthesis
• Structure, phase transitions and kinetics of crystalline ice phases and gas-hydrates
• Powder diffraction: peak shapes, parametric diffraction, ab initio structure solution
• Monte-Carlo simulation of neutron instrumentation
• Position sensitive detectors: microstrip gas chamber detectors

Recent publications (from over 75 refereed published papers)

1. V. K. Fedotov, V. E. Antonov, I. O. Bashkin, T. Hansen, and I. Natkaniec
   "Displacive ordering in the hydrogen sublattice of yttrium trihydride"
   Journal of Physics Condensed Matter 18 (2006) 1593-99.
2. H. Ehrenberg, E. Muessig, K. G. Bramnik, P. Kampe, and T. Hansen
   "Preparation and properties of sodium iron orthooxomolybdates, Na_xFe_y(MoO₄)_z"
   Solid State Sciences 8 (2006) 813-20.
3. C. A. Bridges, T. Hansen, A. S. Wills, G. M. Luke, and J. E. Greedan
   "Frustrated magnetism and the effects of titanium substitution in the mixed-valence oxide Ba V_10-x Ti_x O₁₅"
   Physical Review B - Condensed Matter and Materials Physics 74 (2006) 0244261-9.
4. V. E. Antonov, I. O. Bashkin, V. K. Fedotov, S. S. Khasanov, T. Hansen, A. S. Ivanov, A. I. Kolesnikov, and I. Natkaniec
   "Crystal structure and lattice dynamics of high-pressure scandium trihydride"
   Physical Review B - Condensed Matter and Materials Physics 73 (2006) 0541071-6.
5. D. Wallacher, M. Rheinstaedter, T. Hansen, and K. Knorr
   "Neutron diffraction study of He solidified in a mesoporous glass"
   Journal of Low Temperature Physics 138 (2005) 1013-24.
6. H. Sitepu, J. P. Wright, T. Hansen, D. Chateigner, H. G. Brokmeier, C. Ritter, and T. Ohba
   "Combined synchrotron and neutron structural refinement of R-phase in Ti_50.75 center dot Ni_47.75Fe_1.50 shape memory alloy"
   Icotom 14: Textures of Materials, Pts 1 and 2, 495-497 (2005) 255-60.
7. P. Ruello, L. Desgranges, G. Baldinozzi, G. Calvarin, T. Hansen, G. Petot-Ervas, and C. Petot
   "Heat capacity anomaly in UO₂ in the vicinity of 1300 K: An improved description based on high resolution X-ray and neutron powder diffraction studies"
   Journal of Physics and Chemistry of Solids 66 (2005) 823-31.
8. I. Popa, S. Rivoirard, D. Chateigner, T. Hansen, and D. Fruchart
   "Texture development in Nd-Fe-V alloys by hot deformation in view of permanent magnet properties"
   Icotom 14: Textures of Materials, Pts 1 and 2, 495-497 (2005) 1389-94.
9. M. M. Koza, B. Geil, K. Winkel, C. K?r, F. Czeschka, M. Scheuermann, H. Schober, and T. Hansen
   "Nature of amorphous polymorphism of water"
   Physical Review Letters 94 (2005) 1-4.
10. I. Kaiser-Bischoff, H. Boysen, C. Scherf, and T. Hansen
    "Anion diffusion in Y- And N-doped ZrO₂"
    Physical Chemistry Chemical Physics 7 (2005) 2061-67.
11. D. Holland-Moritz, T. Schenk, P. Convert, T. Hansen, and D. M. Herlach
    "Electromagnetic levitation apparatus for diffraction investigations on the short-range order of undercooled metallic melts"
    Measurement Science and Technology 16 (2005) 372-80.
12. P. Fischer, K. Iwasa, K. Kuwahara, M. Kohgi, T. Hansen, and S. Kunii
    "Powder neutron diffraction studies of structure and magnetic Ce ordering in the strongly correlated electron compound Ce_0.75La_0.25B₆₁₁"
    Physical Review B - Condensed Matter and Materials Physics 72 (2005) 0144141-6.
13. J. Chen, G. A. Lager, M. Kunz, T. C. Hansen, and P. Ulmer
    "A Rietveld refinement using neutron powder diffraction data of a fully deuterated topaz, Al₂SiO₄(OD)₂"
    Acta Crystallographica Section E: Structure Reports Online 61 (2005) i253-i55
14. A. Benmarouane, T. Hansen, P. Millet, and A. Lodini
    "Texture measurements of hydroxyapatite crystallites at bone-implant interfaces in sheep tibia"
    Diffusion and Defect Data Pt.B: Solid State Phenomena, 2005, p. 427-32.
15. V. E. Antonov, T. E. Antonova, V. K. Fedotov, T. Hansen, A. I. Kolesnikov, and A. S. Ivanov
    "Neutron scattering studies of gamma-CoH"
    Journal of Alloys and Compounds 404-406 (2005) 73-76.

Responsibilities

• Responsible for the high-intensity two-axis diffractometer D20
• Local contact for experiments in diffraction, crystallography, physisorption, chemical kinetics, texture, disordered materials and magnetism, on powder samples, liquids, and single crystals
• Member of the Diffraction Group
• Member of the ILL Industry Liaison Group
• Member of the Comité Entreprise (international schools and student grants)
• Local thesis supervisor for Navid Qureshi (Darmstadt)

Curriculum Vitae

• 1985-90 Studies of Chemistry, University of Kiel, Germany
• 1989/90 Diploma thesis on high temperature synthesis of rare earth oxides of the K₂NiF₄ structure type, Inorganic Chemistry, Kiel, Germany
• 1990-94 PhD thesis on high oxygen pressure synthesis & structure of mercury oxides and lattice energy, Inorganic Chemistry, Kiel, Germany
• 1994/95 Marie Curie post doc fellow, Laboratoire des Fluorures, University of Le Mans, France
• 1995-98 Research Scientist, Forschungszentrum, Germany, delegated to ILL, Grenoble, France
• 1998-2000 Research Scientist, Institut Laue-Langevin, Grenoble, France
• 2000-today Staff Scientist, Institut Laue Langevin, Grenoble, France
• 2005/06 Sabbatical semester at University of G?ngen, Germany