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The Helmholtz Young Investigators Group (VH-NG-734)

“Advanced synchrotron based systematic investigations of lanthanide and actinide systems to understand and predict their reactivity”

is financially supported within the 07.2011-10.2016 time period by the Helmholtz Association of German Research Centers (HGF) and the Karlsruhe Institute of Technology (KIT), Faculty of Chemistry and Biosciences, Institute for Nuclear Waste Disposal (INE)

We systematically investigate the electronic and coordination structures of actinide (An) and chemical homologue lanthanide (Ln) systems with novel synchrotron-based high energy resolution X-ray emission/absorption/inelastic scattering techniques. The experimental results are supported by theoretical calculations and simulations with quantum chemical codes. These investigations improve our understanding of An/Ln reactivity in repository systems and waste matrices on a molecular scale and thereby support the reliability of safety case evaluation of the repository long term safety. The elucidation of electronic and coordination structures of, e.g., An/Ln extraction ligand complexes finds on the one hand application in optimization of separation technologies of lanthanide cations from minor actinides (partitioning), while at the same time provides basic insight into structure-reactivity relationships of actinide elements, which is a present scientific frontier.

The Team

Group Leader

 

Teaching activities:

  • Karlsruhe Institute of Technology
  • Faculty of Chemistry and Biosciences, Winter Semester
  • Lecture “Instrumental Analytics”

Tonya Vitova

Tonya.Vitova∂kit.edu

+49 721 608-24024

 

 

Members

 

Sebastian Bahl

Sebastian.Bahl∂kit.edu

+49 721 608-28079

Aaron Beck

Aaron.Beck∂student.kit.edu

+49 721 608-28079

Ivan Pidchenko

Ivan.Pidchenko∂kit.edu

+49 721 608-28079

PhD Project:

"Advanced spectroscopic and microscopic structural investigations of nuclear waste glass forms”

Master thesis:

"Immobilization of rhenium- and cesium-rich simulated solid nuclear waste residues"

 

Post-Doc Project:

"Investigation of structural properties of actinides in model systems by advanced X-ray spectroscopy"

 

Former members

Alisa Prokopchuk, Karlsruhe Institute of Technology (KIT), Germany

 

10.2016 - 04.2017: Master thesis

„Preparation of Rb2UO2X4 compounds (X= F,Cl,Br) and characterizytion of bonding differences by spectroscopy and quantum chemical methods“

Ivan Pidchenko, Institut für Nukleare Entsorgung, Karlsruhe Institute of Technology (KIT), Germany

 

10.2016 - 04.2017: PhD project

„Characterisation of actinide species in systems relevant for safety assessment of a nuclear waste repository by high-resolution X-ray emission/absorption spectroscopy“

Tim Prüßmann, Institut für Nukleare Entsorgung, Karlsruhe Institute of Technology (KIT), Germany

 

07.2011 - 04.2015: PhD project

„Characterization of bonding differences by advanced synchrotron based X-ray spectroscopy“

Sebastian Bahl, Karlsruhe Institute of Technology (KIT), Germany

 

02.2013 - 07.2013: Diploma thesis

„Charakterisierung von verglasten, hochradioaktiven, Mo/P/Zr/Cs-reichen Simulatabfällen mittels verschiedener spektroskopischer Techniken“, Grade: 1.0 (highest in Germany)

Veronika Koldeisz, Budapest University of Technology and Economics (BME), Hungary

 

09.2013 – 07.2014: Master's thesis

“Characterization of uranium in multi-component borosilicate glass by high-energy resolution X-ray spectroscopy techniques”, Grade: 5.0 (highest in Hungary)

Paul Estevenon, École Nationale Supérieure de Chimie de Montpellier (ENSCM), France

 

06.2014 - 09.2014: Internship

"Characterization of simulated Tc- and Cs-rich solid waste residue"

Andrea Kutzer, Karlsruhe Institute of Technology (KIT), Germany

 

2011 - 2014: PhD project

“Untersuchungen zum Inkorporationsverhalten von simulierten HLW-Borosilikatgläsern zur Immobilisierung Mo(VI)-reicher Abfälle”

 

Alexander Ernst, Karlsruhe Institute of Technology (KIT)

 

04.2012 - 09.2012: practical part of “berufliche Ausbildung”

"Design and technical drawings of positioning part of a detector positioning assembly"

 

Valentine Traunfelder, Karlsruhe Institute of Technology (KIT)

 

04.2013 – 01.2014: practical part of “berufliche Ausbildung”

“Design and technical drawings of liquid cells for M edge high resolution X-ray absorption spectroscopy studies of actinide materials”

 

 

 

Internship students

Heloise Morin, École des Mines de Nantes (Mines Nantes), France

 

05.2011 - 08.2011

“Measurements, data reduction and comparison of N K-edge XANES spectra of n-Pr-BTP ligand and [Ln(n-Pr-BTP)3](NO3)3 complexes”

 

Bastien Gademann, National Graduate School of Chemistry of Montpellier (ENSCM), France

 

06.2012 - 09.2012

“Alignment procedure of a multi-analyzer crystal X-ray emission spectrometer using SPEC macros”

 

Stelyana Lechchanska, Technical University of Sofia (TU Sofia), Bulgaria

 

07.2013 - 09.2013

“Design and technical drawings of a slit system, an integral part of the multi-analyzer crystals X-ray emission spectrometer”

 

 

 

 

Guest scientists

Aurora Walesh, Trinity Collage Dublin (TCD), School of Chemistry, Ireland

 

4.03.2013 - 15.03.2013: Short term scientific mission

“Structural characterization of UO2 alteration products by X-ray techniques”

Funded by COST: European cooperation in science and technology

Yulia Podkovyrina, Southern Federal University (SFedU) Rostov-on-Don, Russia

 

02.2014 –03.2014: Scholarship

“Quantum chemical calculations of HR-XANES M edge spectra of uranium oxides”

Funded by German Russian Interdisciplinary Science Center (G-RISC)

10.2014 –03.2015: Scholarship

“Optimization of structures describing U sorption and incorporation into magnetite”

Funded by German Academic Exchange Service (DAAD)

Prof. Robert Baker, Trinity College Dublin (TCD), School of Chemistry, Ireland

 

01.2015- 03.2015: TALISMAN project

 “Neptunium Incorporation into Minerals: A Synthetic and X-ray Spectroscopic Study”

Projects

An geochemistry: The chemical state of U after interaction with magnetite

Long-term storage of high-level radioactive waste is associated with potential radioecological hazards. One chemical element of high interest is uranium (U), which mainly exists as a mobile U(VI) (oxidizing conditions) and sparingly soluble U(IV) (reducing conditions) species. It is expected that the main inorganic reducing agents for U(VI) in the environment are ferrous species in magnetite, formed on the steel canister surface as an intermediate iron (Fe) corrosion product. Continuous interaction and related phase dissolution/recrystallization processes can lead to U redox changes and structural U incorporation into Fe oxides, resulting in U immobilization. U redox state and speciation analyses are still very challenging due to simultaneous formation of several different species in such mineral systems. New advanced spectroscopic methods for speciation studies provide more precise results for the characterization of such systems. The main goal of the investigations of Ivan Pidchenko within his PhD project is to assess the U M4 edge high energy resolution X-ray absorption near edge structure (HR-XANES) spectroscopy technique for detection of U(V) possibly co-existing with U(IV) and U(VI) under reducing conditions on/in Fe containing minerals. In addition to U M4 edge HR-XANES, U L3 edge extended X-ray absorption fine structure (EXAFS), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) techniques are applied to identify the redox states of U and if it is predominantly sorbed or incorporated in the magnetite structure. For example, a high resolution TEM image of 10000 ppm U co-precipitated with magnetite recorded by Tadahiro Yokosawa (INE) reveals formation of UO2 on the surface of the Fe3O4 nanoparticles (see the figure). Our recent U M4 edge HR-XANES results unambiguously confirm for the first time the presence of U(V) in samples with 1000 and 3000 ppm U (publication is in preparation).

Vitrified nuclear waste: Differences of structural properties of model and genuine nuclear waste glasses

Understanding the long term behavior of vitrified nuclear waste requires a full and detailed characterization of the materials including their characteristics as synthesized and after exposure to groundwater. Genuine radioactive waste glass has a complex chemical composition. Therefore, Sebastian Bahl and Veronika Koldeisz within their PhD and master projects, respectively, took a simplified approach by investigating and comparing the oxidation states and local atomic environments of U, Pu and Np in high level waste (HLW) glass sampled during operation of the “vitrification plant Karlsruhe” (VEK) and in model glasses (see the figure) with the same borosilicate base glass matrix by An M edge HR-XANES, U L3 edge extended EXAFS, XPS and TEM techniques (presented as an oral contribution on the ATAS 2014 workshop and poster presentation at EUFEN4). The preparation and characterization of the model glasses are performed within the TALISMAN (Transnational Access to Large Infrastructure for a Safe Management of ActiNide) project “Advanced spectroscopic and microscopic investigations of Pu-doped borosilicate glass” in collaboration with the group of Joe Sommers, Institute for Transuranium Elements (JRC-ITU), Karlsruhe, Germany (publication is in preparation).

Vitrified nuclear waste: Influence of high Mo content on the vitrification properties of borosilicate glass

Mo(VI) has low solubility in borosilicate glass, tending to separate out into molybdate rich phases during the vitrification process. These phases may crystallize in the form of soluble alkali Mo(VI) phases incorporating significant amounts of radioactive isotopes during glass melt cooling and have the potential to release radionuclides in the environment following contact with ground water. Understanding factors favoring or disfavoring their formation in borosilicate glasses allows development of glass compositions capable of incorporating high Mo loadings, yet avoiding formation of such soluble phases. Andrea Kutzer and Sebastian Bahl within their PhD and diploma projects, respectively, identified and quantified the contributions of the different crystalline (see the figure) and dispersed Mo species in the glass matrix by applying the Mo K-edge HR-XANES technique augmented by other spectroscopy and microscopy methods (Raman, XRD, SEM-EDX, TEM). Mo solubility limit determination and identification of potentially water soluble crystalline phases were also aimed (see the poster of Sebastian Bahl et al. granted a poster prize at the Actinide XAS 2014 workshop, publication is currently in preparation). The project is partially financially supported by the Wiederaufarbeitungsanlage Karlsruhe (WAK).

Selectivity: Origin of the bonding affinity of the BTP molecule to An compared to Ln elements

One of the major steps in the partitioning and transmutation (P&T) strategy for the reduction of the long term radiotoxicity and heat-load of spent nuclear fuel is the separation of 5f elements from their chemically similar 4f counterparts. Selective liquid-liquid extraction of An(III) from Ln(III) has been demonstrated using heterocyclic N-donor ligands, e.g., bistriazinylpyridines (BTP) and bistriazinyl-bipyridines (BTBP). However, these ligands do not yet fulfill all necessary criteria for application in an industrial process. Further ligand optimization requires a sound understanding of the chemical and physical properties responsible for their selectivity towards An(III). Systematic comparative N K-edge XANES and Ln and An L edge HR-XANES/XES investigations complemented by quantum chemical calculations can help to differentiate between subtle bonding and geometric structural differences in An(BTP)3 and Ln(BTP)3  complexes looking from the point of view of the organic ligand or the metal center. Bonding characteristics like molecular orbital energy differences and relative electronic populations can be extracted. The figure depicts an optical and a scanning transmission X-ray microscopy (STXM, inset) image of Am(BTP)3(OTf)3 crystals. The STXM image is measured in collaboration with the group of David Shuh at the Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, USA (see the poster Tim Prüßmann presented at Actinide XAS 2014, publication in preparation).

Electronic structure: Probing An electronic structure by HR-XANES and XES techniques

Dicesium uranyl tetrachloride (Cs2UO2Cl4) has been a model compound for experimental and theoretical studies of electronic structure of U(VI) in the form of UO22+ (uranyl ion) for decades. We have obtained angle-resolved electronic structure information for an oriented Cs2UO2Cl4 crystal, specifically relative energies of 5f and 6d valence orbitals probed with extraordinary energy resolution by polarization dependent HR-XANES (PD-HR-XANES) (see the figure) and compare these with predictions from quantum chemical Amsterdam density functional theory (ADF) and ab initio real space multiple scattering Green’s function based FEFF codes. The obtained results have fundamental value but also demonstrate an experimental approach, which offers great potential to benchmark and drive improvement in theoretical calculations of electronic structures of actinide elements (see Vitova et al. in Inorg. Chem.)

Recent Highlights

Electrochemical cell

3D model (left) and a photograph (right) of a compact electrochemical cell for in-situ synchronized UV-VIS and X-ray absorption/emission spectroscopy investigations. The cell equipped with two Kapton windows with 8 and 13 µm thickness was developed within the PhD project of Ivan Pidchenko and was applied in March 2015 in an initial high energy resolution X-ray absorption near edge structure (HR-XANES) experiment at the U M4 absorption edge. Partial reduction of U(VI) to U(V) was successfully recorded by simultaneous UV-VIS and U M4 HR-XANES edge measurements at the INE-Beamline.

Liquid cells for air-sensitive samples

 

3D model (left) and a photograph (right) of sample holders integrated in an inert gas cell for studies of liquid samples at An M4,5 absorption edges. The inner and outer compartments are sealed by Kapton windows with 8 and 13 µm thickness, respectively. First successful application of these cells as part of the PhD project of Ivan Pidchenko was the recent Pu M5 edge HR-XANES investigation of Pu(III), Pu(IV) and Pu(VI) in aqueous solutions (prepared by David Fellhauer, INE) at the INE-Beamline in March 2015.

 

Genuine nuclear waste glass from the Vitrification Facility Karlsruhe (VEK)

First successful U M4, Pu M5 and Np M5 edge HR-XANES studies of high level waste from nuclear fuel reprocessing vitrified in borosilicate glass matrix were performed within the PhD project of Sebastian Bahl at the INE-Beamline. The sample with less than 1 mm2 size and about 200 µSv/h dose rate (left hand side in the photograph) was prepared by Ernesto Gonzalez-Robles in a shielded box line in the controlled area laboratories of INE.

 

Spent nuclear fuel

 

First successful U M4 and Pu M5 edge HR-XANES investigations of a footprint of spent nuclear fuel pellet exhibiting a high burnup structure (photograph on the left) were performed in March 2015 at the INE-Beamline as part of the PhD project of Sebastian Bahl. The photograph on the right hand side depicts the position dependent U Mβ fluorescence emitted by the sample. The sample was prepared by Ernesto Gonzalez-Robles in the controlled laboratories of INE.

The Instrumentation

High energy resolution X-ray emission spectrometer

The utility of high energy resolution X-ray absorption near edge structure (HR-XANES), X-ray emission (XES) and resonant inelastic X-ray scattering (RIXS) spectroscopy techniques in studies of An elements was the motivator for installing and commissioning a multi-analyzer Johann type X-ray emission spectrometer (MAC-spectrometer, see the figure above) at the INE-Beamline for actinide research at the ANKA synchrotron radiation facility, Karlsruhe, Germany. The MAC-spectrometer is ultimately destined to be the central instrument at the radioactive end station of the newly constructed beamline for catalysis and actinide research (CAT-ACT-Beamline, beginning operation in 2016). The MAC-spectrometer is an adapted design of the XES spectrometer at the ID26 Beamline, ESRF, Grenoble, France, containing five spherically bent analyzer crystals with 1 m bending radius. Our set-up is optimized for An M4,5 edge HR-XANES and XES/RIXS experiments; absorption of 3-4 keV photons by air is minimized by a He environment enclosing sample, https://wsm10.scc.kit.edu/cms/RedDotTemp/E8D1E516BFA249CBA172FDDB96EB2148/7A9300D552E142D8A44DBD1A157F6C93/bla2.pngcrystals, and detector, thereby enhancing efficiency. This instrument, combined with access to the controlled area laboratory at INE in close proximity, is worldwide unique, enabling An M4,5 edge HR-XANES and XES/RIXS investigations of solid and liquid phase radioactive materials, including those under extreme conditions. The Figures depict Pu M5 edge HR-XANES, conventional XANES spectra (below) and a 3d4f RIXS map (2 hours measurement, left) of 50 mM Pu(VI) in aqueous solution prepared by David Fellhauer (INE) and measured with our MAC-Spectrometer at the INE-Beamline, ANKA. We would like to specifically thank Alexander Gensch (INE), Volker Krepper, Tim Prüßmann (HYIG, INE), and Jörg Rothe (INE) for the very successful design and manufacture of the He environment.

https://wsm10.scc.kit.edu/cms/RedDotTemp/E8D1E516BFA249CBA172FDDB96EB2148/7A9300D552E142D8A44DBD1A157F6C93/bla2.png

Publications

Peer-reviewed articles

2016

Pidchenko, I., Heberling, F., Kvashnina, K. O., Finck, N., Schild, D., Bohnert, E., Schäfer, T., Rothe, J., Geckeis, H., Vitova, T.

Aqueous U(VI) interaction with magnetite nanoparticles in a mixed flow reactor system: HR-XANES study

(2016) Journal of Physics: Conference Series 712 012086

Podkovyrina, Y., Pidchenko, I., Prüβmann, T., Bahl, S., Soldatov, A., Vitova, T.

Probing covalency in UO3 polymorphs by U M4 edge HR-XANES

(2016) Journal of Physics: Conference Series 712 012092

Popa, K., Prieur, D., Manara, D., Naji, M., Vigier, J.-F., Martin, P. M., Dieste Blanco, O., Scheinost, A. C., Prüβmann, T., Vitova, T., Raison, P. E., Somersa, J., Koningsa, R. J. M.

Further insights into the chemistry of the Bi–U–O system

(2016) Dalton Trans., 45, 7847-7855

Wallesch, M., Verma, A., Fléchon, C., Flügge, H., Zink, D. M., Seifermann, S., Navarro, J. M., Vitova, T., Göttlicher, J., Steininger, R., Weinhardt, L., Zimmer, M., Gerhards, M., Heske, C., Bräse, S., Baumann, T., Volz, D.

Towards Printed Organic Light-Emitting Devices: A Solution-Stable, Highly Soluble Cu–NHetPHOS** Complex for Inkjet Processing

(2016) Chem. Eur. J., 22, 2 – 8

Zimina, A., Dardenne, K., Denecke, M. A., Grunwaldt, J. D., Huttel, E., Lichtenberg, H., Mangold, S.,Prüβmann, T., Rothe, J., Steininger, R., Vitova, T.

The CAT-ACT Beamline at ANKA: A new high energy X-ray spectroscopy facility for CATalysis and ACTinide research

(2016) Journal of Physics: Conference Series 712 012019

2015

Vitova, T., Green, J.C., Denning, R.G., Löble, M., Kvashnina, K., Kas, J.J., Jorissen, K., Rehr, J.J., Malcherek, T., Denecke, M.

Polarization dependent high energy resolution X-ray absorption study of dicesium uranyl tetrachloride

(2015) Inorg. Chem., 54, 174-182

Ibrahimkutty, S., Seiler, A., Prüssmann, T., Vitova, T., Pradip, R., Bauder, O., Wochner, P.,Plech, A., Baumbach, T., Stankov, S.,

A portable ultrahigh-vacuum system for advanced synchrotron radiation studies of thin films and nanostructures: EuSi2 nano-islands

(2015) J. Synchrotron Rad., 22, 91-98

2014

Kühn, T.-J., Zinoveva, S., Hormes, J., Vitova, T., Zinoveva, S., Louis, R., Datta, P., Göttert, J., Kumar, C. S. S. R.

Characterizing metallic nanoparticles by x-ray absorption spectroscopy: two new approaches

(2014) Adv. Syn. Rad., 02, 1-12

Seiler, A., Bauder, O., Ibrahimkutty, S., Pradip, R., Prüssmann, T., Vitova, T., Fiederle, M., Baumbach, T., Stankov, S.

Growth and structure characterization of EuSi2 films and nanoislands on vicinal Si(001) surface

(2014) Journal of Crystal Growth, 407, 74-77

Damien, H., Apostolidis, C., Walter, O., Janßen, A., Manara, D., Griveau, J.-C., Colineau, E., Vitova, T., Prüßmann, T., Wang, D., Kübel, C., Meyer, D.

Ultra-small plutonium oxide nanocrystals: an innovative material in plutonium science

(2014) Chem. Eur. J., 20, 10431-10438

Vitova, T., Mangold, S., Paulmann, C., Gospodinov, M., Marinova, V., Mihailova, B.

X-ray absorption spectroscopy of Ru-doped relaxor ferroelectrics with a perovskite-type structure

(2014) Phys. Rev. B, 89, 144112

Volz, D., Wallesch, M., Grage, S. L., Göttlicher, J.,  Steininger, R., Batchelor, D., Vitova, T., Ulrich, A. S., Heske, C., Weinhardt, L., Baumann, T., Bräse, S.

Labile or stable: can homoleptic and heteroleptic pyrphos-copper complexes be processed from solution?

(2014) Inorg. Chem., 53, 7837-7847

Böhler, R., Welland, M. J., Prieur, D., Cakir, P., Vitova, T., Pruessmann, T., Pidchenko, I., Hennig, C., Guéneau, C., Konings, R. J.M., Manara, D.

Recent advances in the study of the UO2 - PuO2 phase diagram at high temperatures

(2014) Journal of Nuclear Materials, 448, 330-339

Walshe, A., Prüßmann, T., Vitova, T., Baker, R. J.

An EXAFS and HR-XANES study of the uranyl peroxides [UO2(?2-O2)(H2O)2]·nH2O (n = 0, 2) and uranyl (oxy)hydroxide [(UO2)4O(OH)6]·6H2O

(2014)  Dalton Transactions, 43, 4400

Carvajal Nuñez, U., Eloirdi, R., Prieur, D., Martel, L., López Honorato, E., Farnan, I., Vitova, T., Somers, J.

Structure of UC2 and U2C3:XRD, 13C NMR and EXAFS study

(2014) Journal of Alloys and Compounds, 589,  234-239

2013

Prieur, D., Carvajal-Nunez, U., Vitova, T., Somers, J.

Local and electronic structure of americium-bearing PuO2

(2013) European Journal of Inorganic Chemistry, 9, 1518-1524

Goettlicher, J., Kotelnikov, A., Suk, N., Kovalski, A., Vitova, T., Steininger, R.

Sulfur K X-ray absorption near edge structure spectroscopy on the photochrome sodalite variety hackmanite

(2013) Zeitschrift fur Kristallographie, 228 (3), 157-171

Batuk, O.N., Szabo, D.V., Denecke, M.A., Vitova, T., Kalmykov, S.N.

Synthesis and characterization of thorium, uranium and cerium oxide nanoparticles

(2013) Radiochimica Acta, 101 (4), 233-239

Vitova, T., Denecke, M.A., Göttlicher, J., Jorissen, K., Kas, J.J., Kvashnina, K., Prüßmann, T., Rehr, J.J., Rothe, J.

Actinide and lanthanide speciation with high-energy resolution X-ray techniques

(2013) Journal of Physics: Conference Series, 430 (1), 012117

Denecke, M.A., Petersmann, T., Marsac, R., Dardenne, K., Vitova, T., Prüßmann, T., Borchert, M., Bösenberg, U., Falkenberg, G., Wellenreuther, G.

XANES characterization of UO2/Mo(Pd) thin films as models for e-particles in spent nuclear fuel

(2013) Journal of Physics: Conference Series, 430 (1), 012113

Prüßmann, T., Denecke, M.A., Geist, A., Rothe, J., Lindqvist-Reis, P., Löble, M., Breher, F., Batchelor, D.R., Apostolidis, C., Walter, O., Caliebe, W., Kvashnina, K., Jorissen, K., Kas, J.J., Rehr, J.J., Vitova, T.

Comparative investigation of N donor ligand-lanthanide complexes from the metal and ligand point of view

(2013) Journal of Physics: Conference Series, 430 (1), 012115

Rothe, J., Brendebach, B., Bube, C., Dardenne, K., Denecke, M.A., Kienzler, B., Metz, V., Prüßmann, T., Rickers-Appel, K., Schild, D., Soballa, E., Vitova, T.

Characterization of U(VI)-phases in corroded cement products by micro(µ)-spectroscopic methods

(2013) Journal of Physics: Conference Series, 430 (1), 012114

Löble, M.W., Oña-Burgos, P., Fernández, I., Apostolidis, C., Morgenstern, A., Walter, O., Bruchertseifer, F., Kaden, P., Vitova, T., Rothe, J., Dardenne, K., Banik, N.L., Geist, A., Denecke, M.A., Breher, F.

Exploring the solution behavior of f-element coordination compounds: A case study on some trivalent rare earth and plutonium complexes

(2013) Chemical Science, 4 (9), 3717-3724

Carvajal Nuñez, U., Martel, L., Prieur, D., Lopez Honorato, E., Eloirdi, R., Farnan, I., Vitova, T., Somers, J.

Coupling XRD, EXAFS, and 13C NMR to study the effect of the carbon stoichiometry on the local structure of UC1±x

(2013) Inorganic Chemistry, 52 (19), 11669-11676

2012

Vespa, M., Rini, M., Spino, J., Vitova, T., Somers, J.

Fabrication and characterization of (U, Am)O 2-x transmutation targets

(2012) Journal of Nuclear Materials, 421 (1-3), 80-88

Rothe, J., Butorin, S., Dardenne, K., Denecke, M.A., Kienzler, B., Löble, M., Metz, V., Seibert, A., Steppert, M., Vitova, T., Walther, C., Geckeis, H.

The INE-Beamline for actinide science at ANKA

(2012) Review of Scientific Instruments, 83 (4), 043105

Huber, F., Schild, D., Vitova, T., Rothe, J., Kirsch, R., Schäfer, T.

U(VI) removal kinetics in presence of synthetic magnetite nanoparticles

(2012) Geochimica et Cosmochimica Acta, 96, 154-173

Carvajal-Nunez, U., Prieur, D., Vitova, T., Somers, J.

Charge distribution and local structure of americium-bearing thorium oxide solid solutions

(2012) Inorganic Chemistry, 51 (21), 11762-11768

Denecke, M.A., Borchert, M., Denning, R.G., De Nolf, W., Falkenberg, G., Hönig, S., Klinkenberg, M., Kvashnina, K., Neumeier, S., Patommel, J., Petersmann, T., Pruessmann, T., Ritter, S., Schroer, C.G., Stephan, S., Villanova, J., Vitova, T., Wellenreuther, G.

Highly resolved synchrotron-based investigations related to nuclear waste disposal

(2012) Materials Research Society Symposium Proceedings, 1444, 269-280

2011

Denecke, M. A., De Nolf, W., Rack, A., Tucoulou, T., Vitova T., Falkenberg, G., Abolhassani, S., Cloetens, P., Kienzler, B.

Speciation of actinides in granite subjected to tracer studies, in S. Kalmykov, M. A. Denecke (eds.)

(2011) Actinide Nanoparticle Research, Springer Verlag Heidelberg, 413 - 436

2010

Vitova, T., Brendebach, B., Dardenne, K., Denecke, M. A., Lebid, A., Löble, M., Rothe, J., Batuk, O. N., Hormes, J., Liu, D., Breher, F., Geckeis, H.

High resolution x-ray emission spectroscopy: an advanced tool for actinide research

(2010) IOP Conf. Ser.: Mater. Sci. Eng, (9), 012053

Caciuffo, R., Van Der Laan, G., Simonelli, L., Vitova, T., Mazzoli, C., Denecke, M.A., Lander, G.H.

Uranium 5d-5f electric-multipole transitions probed by nonresonant inelastic x-ray scattering

(2010) Physical Review B - Condensed Matter and Materials Physics, 81 (19), 195104

Vitova, T., Kvashnina, K.O., Nocton, G., Sukharina, G., Denecke, M.A., Butorin, S.M., Mazzanti, M., Caciuffo, R., Soldatov, A., Behrends, T., Geckeis, H.

High energy resolution x-ray absorption spectroscopy study of uranium in varying valence states

(2010) Physical Review B - Condensed Matter and Materials Physics, 82 (23), 235118

2009

Vitova, T., Hormes, J., Falk, M., Buse, K.

Site-selective investigation of site symmetry and site occupation of iron in Fe-doped lithium niobate crystals

(2009) Journal of Applied Physics, 105 (1), 013524

Denecke, M.A., Michel, P., Schäfer, T., Huber, F., Rickers, K., Rothe, J., Dardenne, K., Brendebach, B., Vitova, T., Elie, M.

Spatially resolved XRF, XAFS, XRD, STXM and IR investigation of a natural U-rich clay

(2009) Journal of Physics: Conference Series, 190, 012187

Dardenne, K., Brendebach, B., Denecke, M.A., Liu, X., Rothe, J., Vitova, T.

New developments at the INE-Beamline for actinide research at ANKA

(2009) Journal of Physics: Conference Series, 190, 012037

Vitova, T., Zamani-Meymian, M.R., Peithmann, K., Maier, K., Hormes, J.

Atomic displacement and disorder in LiNbO3 single crystal caused by high-energy 3He ion irradiation: An x-ray absorption spectroscopy study

(2009) Journal of Physics Condensed Matter, 21 (49), 495401

Michel, P., Denecke, M. A., Schäfer, T., Brendebach, B., Dardenne, K., Rothe, J., Vitova, T., Huber, F., Rickers, K., Elie, M., Buckau, G.

A combined µ-XAS, STXM and µ-FTIR investigation on the uranium speciation of samples from Autunian shales of the Permian Lodeve Basin (France)

(2009) Proceedings of the 5th Workshop on Speciation, Techniques and Facilities for Radioactive Materials at Synchrotron Light Source, special issue of the “Nuclear Energy Agency  (OECD-NEA) News”

Brendebach, B., Dardenne, K., Denecke, M. A., Liu, X., Rothe, J., Vitova, T.

The INE-Beamline for actinide research at ANKA

(2009) Proceedings of the 5th Workshop on Speciation, Techniques and Facilities for Radioactive Materials at Synchrotron Light Source, special issue of the “Nuclear Energy Agency  (OECD-NEA) News”

Vitova, T., Lebid, A., Liu, D., Dardenne, K., Brendebach, B., Rothe, J., Hormes, J., Denecke, M. A.

The high resolution X-ray fluorescence spectrometer (HRXF): an advance tool for actinide research

(2009) Proceedings of the 5th Workshop on Speciation, Techniques and Facilities for Radioactive Materials at Synchrotron Light Source, special issue of the “Nuclear Energy Agency  (OECD-NEA) News”

2008

Huang, Z., Bensch, W., Sigle, W., van Aken, P. A., Kienle, L., Vitova, T., Modrow, H., Ressler, T.

The modification of MoO3 nanoparticles supported on mesoporous SBA-15: characterisation using X-ray scattering, N2 physisorption, transmission electron microscopy, high-angle annular darkfield technique and XAFS spectroscopy

(2008) J. Mater Sci., 43, 244-253

Vitova, T., Hormes, J., Peithmann, K., Woike, T.

X-ray absorption spectroscopy study of valence and site occupation of copper in LiNbO3: Cu

(2008) Physical Review B - Condensed Matter and Materials Physics, 77 (14), 144103

2007

Brendebach, B., Dardenne, K., Denecke, M. A., Rothe, J., Vitova, T.

New developments at the INE-Beamline for actinide research at ANKA

(2007) Nucl. Instr. and Method. in Phys. Res. A , 582, 80

Vitova, T., Zamani – Meymian, M. – R., Maier, K., Peithmann, K., Hormes, J.

X-ray Absorption Spectroscopy Investigation of Lithium Niobate Irradiated with helium Ions. (3He:LiNbO3)

(2007) Proceedings of the 4th Workshop on Speciation, Techniques and Facilities for Radioactive Materials at Synchrotron Light Source, special issue of the “Nuclear Energy Agency  (OECD-NEA) News”

 

 

 

Oral presentations
2016

Vitova, T.

Structural investigations of actinides with high energy resolution X-ray absorption spectroscopy.

Helmholtz-Zentrum Dresden-Rossendorf, Institute for Resource Ecology, 15.06.2016

Vitova, T.

Structural properties of actinide materials revealed by high energy resolution X-ray absorption spectroscopy.

4th annual Carnival conference session, Universität Köln, 3.02.2016

Vitova, T.

Structural properties of plutonium systems revealed by high resolution XANES and RIXS techniques.

Plutonium Futures — The Science 2016, Karlsruhe, 20.09.2016

Martin, P., Strach, M., Prieur, D., Bès, R., Belin, R. C., Manara, D., Valot, C., Vitova, T., Prüßmann, T., Dardenne, K., Rothe, J.

Study of the 5f electronic states in uranium-plutonium mixed oxides using high resolution XANES.

Plutonium Futures — The Science 2016, Karlsruhe, 20.09.2016

Bahl, S., Roth, G., Weisenburger, S., Vitova, T., Geckeis, H., Yano, T.

Investigations of high U and Pu loaded boro- and alumosilicate glasses by advanced synchrotron based spectroscopic techniques – A cooperation with CEA Marcoule.

8th vitrification workshop Tokyo, May 2016

Polly, R., Schimmelpfennig, B., Pidchenko, I., Geckeis, H., Vitova, T.

Quantum chemical investigation of incorporation of Uranium(V) into Magnetite: combining multi reference ab initio methods and density functional theory.

3rd International Workshop on Advanced Techniques in Actinide Spectroscopy.

EMSL Richland, Washington, USA, November 8, 2016

Chevreux, P., Tissandier, L., Bahl, S., Laplace, A., Deloule, E.

Uranium solubility in a molten reductive glas.

NuMat2016: The Nuclear Materials Conference

Le Corum, Montpellier, France, 7–10 November 2016

2015

Vitova, T.

Structural properties of actinide materials revealed by high energy resolution X-ray absorption spectroscopy.

National Conference on Environmental Radiochemistry, Chengdu, China, August 31 – September 6, 2015

Vitova, T.

Structural properties of nanomaterials studied by high energy resolution X-ray emission and absorption spectroscopy techniques.

International Joint School on Smart Nanomaterials and X-ray Optics 2015. Modeling, Synthesis and Diagnostics, Rostov-on-Don, Russia, September 27-30, 2015

Vitova, T.

High Resolution X-ray Absorption Spectroscopy as an Advanced Tool for Structural Investigations of Actinides.

AVS 62nd International Symposium & Exhibition, San Jose, USA, October 18-23, 2015

Vitova, T.

High energy resolution X-ray absorption spectroscopy: a tool for structural studies of actinide materials.

4rd ITU – INE Research Fellow Day, Karlsruhe, October 14, 2015

Vitova, T.

Workshop lectures

ASEAN Workshop on XANES Simulations and In-situ XAS Experiments (AWXIXE2015), Synchrotron Light Research Institute (SLRI), Thailand, December 2-4, 2015

Vitova, T.

High energy resolution XANES as a tool for electronic structure and oxidation states investigations of actinide materials.

ThUL School in Actinide Chemistry, Karlsruhe, Germany, September 28 – October 2, 2015

Vitova, T.; Green, J.C.; Denning, R. G.; Löble, M.; Kvashnina, K.; Kas, J.J.; Jorissen, K.; Rehr, J.J.; Malcherek, T.; Denecke, M.A.

Polarization Dependent High Energy Resolution X-ray Absorption Study of Dicesium Uranyl Tetrachloride.

EUFEN4, Lisbon, Portugal, April 11-12, 2015

Bahl, S.; Koldeisz, V.; Bohnert, E.; González-Robles, E.; Schild, D.; Metz, V.; Kienzler, B.; Kvashnina, K.; Pidchenko, I.; Prüssmann, T.; Roth, G.; Geckeis, H.; Vitova, T.

Comparative U, Np and Pu M edge high energy resolution X-ray absorption spectroscopy (HR-XANES) investigations of model and genuine active waste glass.

Second Joint Workshop on f-Element Chemistry - f-Kom, Karlsruhe, June 9-10, 2015

Pidchenko, I.; Kvashnina, K.O.; Yokosawa, T.; Finck, N.; Schild, S.; Schäfer, T.; Rothe, J.; Geckeis, H.; Vitova, T.

U redox state and speciation of U in contact with magnetite nanoparticles: high-resolution XANES, EXAFS, XPS and TEM study.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Pidchenko, I.; Kvashnina, K.O.; Yokosawa, T.; Finck, N.; Schild, S.; Schäfer, T.; Rothe, J.; Geckeis, H.; Vitova, T.

U redox state and speciation of U in contact with magnetite nanoparticles: high-resolution XANES, EXAFS, XPS and TEM study.

15th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere (Migration 2015), Santa Fe Community Convention Center, Santa Fe NM, USA, September 13-18, 2015

Vitova, T.; Altmaier, M.; Bahl, S.; Bohnert, E.; Dardenne, K.; Denning, R.G.; Denecke, M.A.; Fellhauer, D.; Geckeis, H.; Gonzalez-Robles, E.; Green, J.C.; Jorissen, K.; Rehr, J.; Kas, J.J.; Kienzler, B.; Kvashnina, K.; Pidchenko, I.; Prüßmann, T.; Rothe, J.; Schäfer, T.; Somers, J.

High energy resolution XANES as a tool for electronic and geometric structural investigations of actinide materials.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Prieur, D.; Martin, P.; Bes, R.; Lebreton, F.; Caisso, M.; Delahaye, T.; Strach, M.; Belin, R.; Martel, L.; Vigier, J.-F.;Prussmann, T.; Vitova, T.; Solari, P.; Kvashnina, K.; Scheinost, A.C.; Somers, J.

Electronic and structural changes induced by the incorporation of aliovalent cation in UO2.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Baker, R.J.; Walshe, A.; Keyes, T.E.; Forster, R.J.; Prüßman, T.; Pidchenko, I.; Vitova, T.

Uranyl Minerals as Models for the Long Term Storage of Spent Nuclear Fuels.

Catalysis and Sensing for our Environment Symposium, Dublin, Irland, July 9-10, 2015

Walshe, A.; Biswas, A.; Spain, E.D.; Keys, T.A.; Forster, R.A.; Prüßman, T.; Pidchenko, I.; Vitova, T.; Baker, R.J.

Uranyl Minerals as Models for the Long Term Storage of Spent Nuclear Fuels.

9th International Conference on f-element chemistry, Oxford, UK, September 6-9, 2015

Arnold, P.L.; Zegke, M.; Jones, G.; Pecharman, A.; Lord, R.; Hollis, E.; Dutkiewicz, M.; Love, J.; Caciuffo, R.; Magnani, N.; Apostolidis, C.; Walter, O.; Zhang, X.; Schreckenbach, G.; Pidchenko, I.; Vitova, T.

From hydrogen to neptunium: Uranyl oxo-functionalisation by as much of the periodic table as possible.

International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2015), Honolulu, Hawaii, December 15-20, 2015

Bahl, S.; Koldeisz, V.; Bohnert, E.; González-Robles, E.; Schild, D.; Kienzler, B.; Kvashnina, K.; Rothe, J.; Dardenne, K.; Boshoven, J.; Martel, L.;  Pidchenko, I.; Prüßmann, T.; Roth, G.; Geckeis, H.; Vitova, T.

Comparative U, Np and Pu M edge high energy resolution X-ray absorption spectroscopy (HR-XANES) investigations of model and genuine active waste glass.

Second Joint Workshop on f-Element Chemistry - f-Kom, Karlsruhe, Germany, June 9-10, 2015.

Vitova T., Green J.C., Denning R.G., Löble M., Kvashnina K., Kas J.J., Jorissen K., Rehr J.J., Malcherek T., Denecke M.A.

Polarization Dependent High Energy Resolution X-ray Absorption Study of Dicesium Uranyl Tetrachloride.

European f-Element Chemistry Research Conference - EUFEN4, Lisbon, Portugal, April 11-12, 2015.

2014

Vitova, T.

Structural investigations of actinides and lanthanides by high energy resolution X-ray absorption/emission spectroscopy

Joint ITU-INE Workshop: Synchrotron-based spectroscopy for actinide science, Institute for Transuranium Elements (ITU), Karlsruhe, Germany, December 5, 2014, invited talk

Vitova, T.

Structural investigations of actinide systems by high energy resolution X-ray absorption spectroscopy

European Synchrotron Radiation Facility (ESRF) spectroscopy meeting, Grenoble, France, November 14, 2014, invited talk

Vitova, T.

High energy resolution x-ray absorption spectroscopy and inelastic x-ray scattering investigations of actinide materials

The 16th International Nanoscience&Nanotechnology conference, NANO’2014, Technical University Bulgaria, Sofia, November 6-8, 2014, invited talk

Bahl, S., Koldeisz, V.; Kvashnina, K.; Yokosawa, T.; Pidchenko, I.; Geckeis, H.

Advanced spectroscopic investigations of genuine active waste glass

2nd International Workshop on Advanced Techniques in Actinide Spectroscopy 2014 (ATAS 2014), Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany, November 3-7

Pidchenko I., Schild D., Fellhauer D., Pruesmann T., Finck N., Rothe J., Vitova T.

Uranium and Plutonium speciation by high energy resolution X-Ray absorption spectroscopy

2nd International Workshop on Advanced Techniques in Actinide Spectroscopy 2014 (ATAS 2014), Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany, November 3-7

Vitova, T.

Structural investigations of actinide systems by high energy resolution X-ray absorption spectroscopy

LCLS/SSRL Annual Users' Meeting, joint SSRL/ALS Workshop Advances in Actinide Science from Synchrotron Spectroscopy, SLAC National Accelerator Laboratory, Menlo Park, California, USA, October 7-10, 2014, invited talk

Vitova, T.

High energy resolution x-ray absorption spectroscopy and inelastic x-ray scattering investigations of actinide materials

V-th National Crystallography Symposium, Bulgaria Sofia, September 25–27, 2014. invited talk

2013

Vitova, T.

Structural investigations of actinides with advanced X-ray spectroscopy techniques

ACTINIDES 2013 Conference, Karlsruhe, July 21-26, 2013, invited talk

2012

VITOVA, T.; DENECKE, M.;GÖTTLICHER, J.; JORISSEN, K.; KAS, J.; KVASHNINA, K.; PRÜSSMANN, T.;  REHR, J.;ROTHE, J.

Actinide speciation with high-energy resolution X-ray absorption spectroscopy and inelastic X-ray scattering                                                                                                                       

XAFS-XV Conference, Beijing, PR China, July 22-28, 2012

Vitova, T.

The potential of high-resolution X-ray emission and resonant inelastic X-ray scattering techniques for speciation studies of actinide materials                             

EUFEN meeting, Tarragona, Spain, June 02 – 04, 2012

Vitova, T.

Actinide speciation with X-ray absorption spectroscopy

ACTINET ThUL Spring school, Karlsruhe, April 26 – 30, 2012, invited talk

Vitova, T., Caciuffo, R., Denecke, M.A., Huber, F., Prüßmann, T., Rothe, J., Schäfer, T., Geckeis, H.

Actinide speciation with high-energy resolution X-ray absorption spectroscopy and inelastic X-ray scattering

ATAS workshop, Dresden, November 5-11, 2012

2011

Vitova, T.

Actinide speciation with high-resolution X-ray absorption and inelastic X-ray scattering

Seminar at Synchrotron SOLEIL, Saint-Aubin. France, November 22, 2011, invited talk

VITOVA, T.; DENECKE M.A.; GEIST, A.; LÖBLE, M.; ROTHE, J.; CACIUFFO, R.; GECKEIS, H.

Actinide speciation with high-resolution X-ray absorption and inelastic X-ray scattering spectroscopy

GDCh Wissenschaftsforum Chemie 2011, Bremen, September 04 - 07, 2011

VITOVA, T.; DENECKE M.A.; LÖBLE, M.; PRÜSSMANN, T.; ROTHE, J.

High-resolution X-ray absorption spectroscopy as an advanced tool for structural studies of lanthanide complexes

XXIV. Tage der Seltenen Erden (Terrae Rarae 2011), Karlsruhe, October 12 – 14, 2011

VITOVA, T.; KVASHNINA, K.O.; DENECKE, M.A.; CACIUFFO, R.; HUBER, F.;  ROTHE, J.; SCHÄFER, T.; BUTORIN, S.M.; GECKEIS, H.;

The potential of high-resolution X-ray emission spectroscopy and non-resonant inelastic X-ray scattering for advanced studies of actinide-materials

AnXAS 2011: 6th Workshop on Speciation Techniques and Facilities for Radioactive Materials at Synchrotron Light Sources and other Quantum Beam Sources, Harima Science Garden City, Hyogo, Japan, March 2 - 4, 2011

2010

Vitova, T.

Advanced X-ray absorption/emission spectroscopic tool for actinide speciation

Plutonium Futures – The Science 2010, Keystone, Colorado, USA, September 19 - 23, 2010

Vitova, T.

The potential of high-resolution X-ray absorption/emission spectroscopy for advanced studies of nano-materials

Nanodesign: Physics, Chemistry, Computer Modeling

German-Russian Interdisciplinary Workshop, Rostov-on-Don, Russia, December 16 - 17, 2010, invited talk

2009

VITOVA, T., BRENDEBACH, B., DARDENNE, K., DENECKE; M.A., LEBID, A., LÖBLE, M., ROTHE J.

High resolution X-ray emission spectroscopy (HRXES): an advanced tool for actinide research

GDCh Wissenschaftsforum Chemie 2009, Frankfurt, August 30th - September 2th, 2009

VITOVA, T., BREHER, F., BRENDEBACH, B., DARDENNE, K., DENECKE; M.A., LEBID, A., LÖBLE, M., ROTHE J.

High resolution X-ray emission spectroscopy (HRXES): an advanced tool for actinide research

ACTINIDES 09, San Francisco, CA, USA, July 12 - 17, 2009

 

 

 

Poster presentations
2016

Bès, R., Kvashnina, K., Martin, P., Rothe, J., Scheinost, A.C., Solari, P.L., Vitova, T.

Actinide's valence states determination : benefits of HERFD-XAS in radioactive material dedicated beamlines.

Ninth International Conference on Nuclear and Radiochemistry - NRC95

Helsinki, Finland, 29.08.-02.09.2016

Martin, P. M., Prieur, D., Bès, R., Belin, R., Strach, M., Manara, D., Valot, C., Vitova, T., Prüßmann, T., Dardenne, K.

Study of the 5f electronic states in uranium-plutonium mixed oxides using high resolution XANES.

NuMat2016: The Nuclear Materials Conference

Le Corum, Montpellier, France, 7–10 November 2016

Pidchenko, I., Kvashnina, K. O., Yokosawa, T., Finck, N., Schild, D., Göttlicher, J., Schäfer, T., Rothe, J., Geckeis, H., Vitova, T.

Speciation of U interacted with magnetite by high-energy resolution X-ray absorption spectroscopy.

Ninth International Conference on Nuclear and Radiochemistry - NRC95

Helsinki, Finland, 29.08.-02.09.2016

2015

Bahl, S.; Koldeisz, V.; Bohnert, E.; González-Robles, E.; Schild, D.; Kienzler, B.; Kvashnina, K.; Rothe, J.; Dardenne, K.; Boshoven, J.; Martel, L.; Pidchenko, I.; Prüßmann, T.; Roth, G.; Geckeis, H.; Vitova, T.

Comparative U, Np and Pu M edge high energy resolution X-ray absorption spectroscopy (HR-XANES) investigations of model and genuine active waste glass.

GDCh Wissenschaftsforum Chemie 2015, Dresden, September 4-7, 2015

Bahl, S.; Koldeisz, V.; Bohnert, E.; González-Robles, E.; Schild, D.; Kienzler, B.; Kvashnina, K.; Rothe, J.; Dardenne, K.; Boshoven, J.; Martel, L.; Pidchenko, I.; Prüßmann, T.; Roth, G.; Geckeis, H.; Vitova, T.

Comparative U, Np and Pu M edge high energy resolution X ray absorption spectroscopy (HR-XANES) investigations of model and genuine active waste glass.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Prüßmann, T.; Geist, A.; Rothe, J.; Lindqvist-Reis, P.; Schimmelpfennig, B.; Kvashnina, K.; Fryer-Kanssen, I.; Kerridge, A.; Vitova, T.

High energy resolution XANES studies of lanthanide partitioning complexes.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Pidchenko, I.; Fellhauer, D.; Prüssmann, T.; Dardenne, K.; Rothe, J.; Vitova, T.

Plutonium oxidation state speciation in aqueous solution studied by high-energy resolution L3 and M5 edge XANES.

4rd ITU – INE Research Fellow Day, Karlsruhe, October 14, 2015

Zimina, A.; Dardenne, K.; Denecke, M.A.; Grunwaldt, J.D.; Huttel, E.; Mangold, S.; Lichtenberg, H.; Rothe, J.; Steininger, R.; Pruessmann, T.; Vitova, T.

The CAT-ACT Beamline at ANKA: A new high energy X-ray spectroscopy facility for CATalysis and ACTinide research.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Wallesch, M.; Volz, D.; Batchelor, D.; Vitova, T.; Steininger, R.; Göttlicher, J.; Bräse, S.; Heske, C.; Weinhardt, L.

Cu K XANES and EXAFS spectroscopy on Cu(I)-emitters.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, August 23-28, 2015

Podkovyrina, Y.; Pidchenko, I.; Pruessman, T.; Bahl, S.; Soldatov, A.; Vitova T.

U M4 HR-XANES and ab-initio investigations of UO3 polymorphic forms.

16th International Conference on X‐ray Absorption Fine Structure (XAFS16), Karlsruhe, Germany, August 23-28, 2015

Podkovyrina, Y.; Pidchenko, I.; Soldatov, A.; Polly, R.; Vitova, T.

Study of Fe3O4 nanoparticles with U using HR-XANES and DFT calculations.

International Joint School on Smart Nanomaterials and X-ray Optics 2015. Modeling, Synthesis and Diagnostics, Rostov-on-Don, Russia, September 27-30, 2015

Wallesch, M.; Volz, D.; Vitova, T.; Göttlicher, J.; Steininger, R.; Bräse, S.; Heske, C.; Weinhardt, L.

Using X-ray absorption to probe the strucural integrity of photoluminescent Cu(I)-complexes upon processing

21st International Symposium on the Photochemistry and Photophysics of Coordination Compounds (ISPPCC 2015), Krákow, Poland, July 5-9, 2015

Bahl, S.; Koldeisz, V.; Bohnert, E.; González-Robles, E.; Schild, D.; Metz, V.; Kienzler, B.; Kvashnina, K.; Pidchenko, I.; Prüßmann, T.; Roth, G.; Geckeis, H.; Vitova, T.

Comparative U and Pu M edge high energy resolution X-ray absorption spectroscopy (HR-XANES) investigations of model and genuine active waste glass.

Energy, Science & Technology Conference 2015 - EST, Karlsruhe, Germany, May 20-22, 2015.

Bahl, S.; Koldeisz, V.; Bohnert, E.; González-Robles, E.; Schild, D.; Metz, V.; Kienzler, B.; Kvashnina, K.; Pidchenko, I.; Prüßmann, T.; Roth, G.; Geckeis, H.; Vitova, T.

Comparative U and Pu M edge high energy resolution X-ray absorption spectroscopy (HR-XANES) investigations of model and genuine active waste glass.

European f-Element Chemistry Research Conference - EUFEN4, Lisbon, Portugal, April 11-12, 2015.

2014

BAHL, S.; KOLDEISZ, V.; Pidchenko, I.; PRÜSSMANN, T.; ROTHE, J.; ROTH, G.; KVASHNINA, K.; GECKEIS, H.;  VITOVA, T.

High energy resolution X-ray absorption near edge structure spectroscopy investigations of highly active genuine VEK glass.

ANKA User Meeting 2014, Karlsruhe Institute of Technology (KIT), Germany, October 13-14, 2014.

PIDCHENKO, I., FELLHAUER, D., PRÜSSMANN, T., DARDENNE, K., ROTHE, J., VITOVA, T.

Plutonium oxidation states speciation in perchloric acid by high-energy resolution XANES technique.

ANKA User Meeting 2014, Karlsruhe Institute of Technology (KIT), Germany, October 13-14, 2014.

PRÜSSMANN, T.; DENECKE, M. A.; GEIST, A.; ROTHE, J.; LINDQVIST-REIS, P.; BANIK, N. L.; SCHIMMELPFENNIG, B.; FELLHAUER, D.; APOSTOLIDIS, C.; WALTER, O.; BATCHELOR, D. R.; NAGEL, P.; SCHUPPLER, S.; KVASHNINA, K.; VITOVA, T.

Comparative investigation of N donor ligand and lanthanide/actinide partitioning complexes from the metal and ligand point of view.

ANKA User Meeting 2014, Karlsruhe Institute of Technology (KIT), Germany, October 13-14, 2014.

Pidchenko, I.; FELLHAUER, D.; PRÜSSMANN, T.; DARDENNE, K.; ROTHE, J.; VITOVA, T.

Plutonium oxidation state speciation in aqueous solution studied by high-energy resolution XANES technique.

ANKA User Meeting 2014, Karlsruhe Institute of Technology (KIT), Germany, October 13-14, 2014.

BAHL, S.; KOLDEISZ, V.; Pidchenko, I.; PRÜSSMANN, T.; ROTHE, J.; ROTH, G.; KVASHNINA, K.; GECKEIS, H.;  VITOVA, T.

High energy resolution X-ray absorption near edge structure spectroscopy investigations of highly active genuine VEK glass.

3rd ITU – INE Research Fellow Day, JRC-KIT Karlsruhe, Germany, February 6, 2014

Pidchenko, I.; FELLHAUER, D.; PRÜSSMANN, T.; DARDENNE, K.; ROTHE, J.; VITOVA, T.

Plutonium oxidation state speciation in aqueous solution studied by high-energy resolution XANES technique.

3rd ITU – INE Research Fellow Day, JRC-KIT Karlsruhe, Germany, February 6, 2014.

GÖTTLICHER, J.; STEININGER, R.; MANGOLD, S.; SIMON, R.; VITOVA, T,; ROTHE, J.; GASHAROVA, B.; GARBEV, K.

New Perspectives of Synchrotron Radiation based Techniques for Mineralogical Research at ANKA.

92nd Annual Meeting Deutsche Mineralogische Gesellschaft, Jena, September 21-24 2014.

BAHL, S.; KUTZER, A.; KOLDEISZ, V.; PRÜSSMANN, T.; YOKOSAWA, T.; Pidchenko, I.; ROTH, G.; GECKEIS, H.; VITOVA, T.

Impact of increasing MoO3 loading on the composition of multicomponent borosilicate glass.

Actinide XAS 2014, Schloss Böttstein, Switzerland, May 20-22, 2014. (Poster Prize)

PRÜSSMANN, T.; DENECKE, M. A.; GEIST, A.; ROTHE, J.; LINDQVIST-REIS, P.; BANIK, N. L.; SCHIMMELPFENNIG, B.; FELLHAUER, D.; APOSTOLIDIS, C.; WALTER, O.; BATCHELOR, D. R.; NAGEL, P.; SCHUPPLER, S.; KVASHNINA, K.; VITOVA, T.

Comparative investigation of N donor ligand and lanthanide/actinide partitioning complexes from the metal and ligand point of view.

Actinide XAS 2014, Schloss Böttstein, Switzerland, May 20-22, 2014.

Pidchenko, I.; FELLHAUER, D.; PRÜSSMANN, T.; DARDENNE, K.; ROTHE, J.; BOHNERT, E.; SCHIMMELPFENNIG, B.; VITOVA, T.;

Plutonium oxidation state speciation in aqueous solution studied by Pu L and M edge high-energy resolution XANES technique.

Actinide XAS 2014, Schloss Böttstein, Switzerland, May 20-22, 2014

PODKOVYRINA, Y.; Pidchenko, I.; PRÜSSMANN, T.; KVASHNINA, K.; SOLDATOV, A.; VITOVA, T.

Speciation of uranium sorbed on magnetite/maghemite nanoparticles: HR-XANES and ab-initio calculations.

Actinide XAS 2014, Schloss Böttstein, Switzerland, May 20-22, 2014

PRÜSSMANN, T.; DENECKE, M.A.; GEIST, A.; ROTHE, J.; LINDQVIST-REIS, P.; BANIK, N.L.; SCHIMMELPFENNIG, B.; FELLHAUER, D.; APOSTOLIDIS, C.; WALTER, O.; BATCHELOR,D.R.;  NAGEL, P.; SCHUPPLER, S.; VITOVA, T.

Comparative investigation of N donor ligand and lanthanide/actinide partitioning complexes from ligand point of view.

50th Symposium on Theoretical Chemistry 2014 Quantum Chemistry and Chemical Dynamics

University of Vienna’s city campus at Spitalgasse 2-4, 2014

VESPA, M.; DARDENNE, K.; DENECKE, M.; PRÜSSMAN, T.; ROTHE, J.; VITOVA, T.; GECKEIS, H.;

New X-ray absorption spectroscopic opportunities for actinides and radionuclides experiments: INE-Beamline & CAT-ACT at ANKA.

Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten 2014, Bonn, September 21-23, 2014

2013

PIDCHENKO, I., FELLHAUER, D., PRÜSSMANN, T., DARDENNE, K., ROTHE, J., VITOVA, T.

Plutonium oxidation states speciation in perchloric acid by high-energy resolution XANES technique.

ANKA Users Meeting 2013, September 26, 2013

Bahl, S.; Vitova, T.; Kutzer, A.; Prüßmann, T.; Pidchenko, I.; Soballa, E.; Roth, G.; Geckeis, H.

Impact of increasing Cs3PMo12O40 loading on vitrification properties of multicomponent borosilicate glass.

22nd International Congress on X-Ray Optics and Microanalysis (ICXOM 2013), Hamburg, September 2-6, 2013

2012

PRÜSSMANN, T.; DENECKE, M.; GEIST, A.; ROTHE, J.; LÖBLE, M.; CALIEBE, W.; BATCHELOR, D.; VITOVA, T.

Comparative investigation of N donor ligand-lanthanide complexes from the metal and ligand point of view.

XAFS-XV Conference, Beijing, PR China, July 22-28, 2012

KUTZER, A.VITOVA, T.; KADEN, P.; SOBALLA, E.; DENECKE, M.; ROTH, G.; WEISENBURGER, S.; GECKEIS, H.

Structural investigations of Mo-rich model nuclear waste glass compositions.

ANKA user meeting 2012, Karlsruhe, October 10-11, 2012

PRÜSSMANN, T.; DENECKE, M.; GEIST, A.; ROTHE, J.; LINDQVIST-REIS, P.; APOSTOLIDIS, C.;  NAGEL, P.; SCHUPPLER, S.; VITOVA, T.;

Comparative investigation of N donor ligand-lanthanide complexes from the metal and ligand point of view.

ANKA user meeting 2012,  Karlsruhe, October 10-11, 2012

2011

VITOVA, T.; DENECKE, m.A.; FINCK, N.; GÖTTLICHER, J.; KIENZLER, B.; METZ, V.; ROTHE, J.;

High-resolution X-ray absorption spectroscopy of U in cemented waste form.

ABC-SALT II., Actinides Brine Chemistry, Karlsruhe, Germany, November 7-8, 2011

PRÜSSMANN, T.;  BATCHELOR, D.;  DENECKE, M.; GECKEIS, H.; A. GEIST, M. LÖBLE, H. MORIN, J. ROTHE AND T. VITOVA

X-ray absorption spectroscopy investigations of partitioning lanthanide complexes from the metal and ligand point of view.

Terrae Rarae 2011, Karlsruhe, October 12-14, 2011

2010

VITOVA, T.; DENECKE, M.A.; KVASHNINA, K.; LÖBLE, M.; DARDENNE K.; ROTHE, J.; BUTORIN, S.M.; SEIBERT, A.; CACIUFFO, R.; GECKEIS, H.

Actinide speciation with high-resolution X-ray absorption/emission spectroscopy.

ANKA User meeting, Karlsruhe, October 7-8, 2010

VITOVA, T.; DENECKE, M.A.; KVASHNINA, K.; LÖBLE, M.; DARDENNE, K.; ROTHE, J.; BUTORIN, S.M.; SEIBERT, A.; CACIUFFO, R.; GECKEIS, H.

Actinide speciation with high-resolution X-ray absorption/emission spectroscopy.

7th International Conference on Inelastic X-ray Scattering, Grenoble, France, October 11-14, 2010

ROTHE, J.; DARDENNE, K.; VITOVA, T.; DENECKE, M.A.; GECKEIS, H.

Actinidenforschung an der INE-Beamline. Status und Perspektiven.

Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlung an Großgeräten (SNI 2010), Berlin, Februar  24-26, 2010
2009

Vitova, T.

High resolution X-ray emission spectroscopy: an advanced tool for actinide research

14th International Conference on X-ray Absorption Fine Structure (XAFS14), Camerino, Italy, July 26 - 31, 2009

Collaborations

Polly Arnold

University of Edinburgh, UK

http://www.homepages.ed.ac.uk/parnold/

 

Robert Baker

Trinity College Dublin, Ireland

https://sites.google.com/site/bakeresearchgroup/home

 

Sergei Butorin

 

Uppsala University, Sweden

http://katalog.uu.se/empinfo/?id=N96-6204

 

Melissa Denecke

 

The University of Manchester, UK

http://www.chemistry.manchester.ac.uk/people/staff/profile/?ea=melissa.denecke

 

Stosh Kozimor

 

Los Alamos National Laboratory, USA

https://www.lanl.gov/

 

Kristina Kvashnina

 

European Synchrotron Radiation Facility, France

http://www.esrf.eu/home/Members/content/staff-web-pages/kvashnin.html

 

Philippe Martin

 

CEA, DEN, DEC, CEN Cadarache, France

http://www.pubfacts.com/author/Philippe+M+Martin

 

Karsten Meyer

 

University of Erlangen, Germany

http://www.inorganic-chemistry.net/kmpages/karsten.html

 

Damien Prieur

Joe Somers

Dario Manara

Christos Apostolidis

Roberto Caciuffo

 

Institute for Transuranium Elements, Germany

https://ec.europa.eu/jrc/en/about/itu

 

John Rehr

University of Washington, USA

http://faculty.washington.edu/jjr/

David Shuh

 

Lawrence Berkeley National Laboratory, USA

 

http://actinide.lbl.gov/gtsc/Staff/dkshuh/

 

Laura Simonelli ALBA Synchrotron Radiation Facility, Spain http://www.cells.es/en/beamlines/bl22-claess/staff

Svetoslav Stankov

Jörg Göttlicher

Stefan Schuppler

Peter Nagel

 

ANKA Synchrotron Radiation Facility, Germany

http://nanodynamics-group.com/stankov.html

 

Alexander Soldatov

Southern Federal University http://www.nano.sfedu.ru/contacts.html

Contact us!

If you are looking for a bachelor, master or PhD project with exciting topic including application of novel synchrotron based X-ray spectroscopy methods contact us. You will have the opportunity to reveal structural properties of actinide and lanthanide systems important for example for molecular scale understanding of processes in a nuclear waste repository. You will work in a young, motivated and enthusiastic team and will perform experiments at the ANKA, KIT and other national and international synchrotron radiation facilities.

Email: Tonya.Vitova∂kit.edu
Telephone: +49 721 608-24024
Address: Karlsruhe Institute of Technology
Institute for Nuclear Waste Disposal
Hermann von Helmholtz Platz 1
76344 Eggenstein-Leopoldshafen, Germany

 

The group life