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40èmes Journées des Actinides & 2nd Workshop on Actinide Targets

27 March 2010 to 1 April 2010
CERN
Europe/Zurich timezone
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Contribution List

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  1. 72. Opening of conference
    28/03/2010, 09:10
  2. 62. Solid state physics at ISOLDE: using radioactive ion beams to study materials
    Dr Karl Johnston (ISOLDE/CERN)
    28/03/2010, 09:20
    Materials science, nanomaterials
    oral
    Materials I
    At the radioactive ion beam facility, ISOLDE-CERN, more than 900 isotopes of 70 elements are produced and delivered as radioactive ion beams of high elemental and isotopic purity. At ISOLDE an extensive solid state programme of research has been in place for many years and continues to develop and expand by the year. This activity embraces a wide range of techniques and materials. Among the...
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  3. 51. Recent progress in the synthesis and characterization of uranium carbide compounds
    Dr Olivier TOUGAIT (Université de Rennes1)
    28/03/2010, 09:40
    Materials science, nanomaterials
    oral
    Materials I
    The binary uranium-carbon phase-diagram comprises three intermediate phases (UC, U2C3 and UC2) showing high melting / decomposition points, high thermal conductivity, lack of phase-transformations at temperatures of practical relevance, and good stability under irradiations, which allow their use under extreme conditions. An enormous amount of work has been directed to those binary compounds...
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  4. 48. Study on the U-Co-Ge ternary system at 973K
    Mr Arnaud Soudé (Université Rennes 1)
    28/03/2010, 10:00
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Materials I
    The recent discovery of the coexistence of ferromagnetic order and pressure induced superconductivity in UCoGe [1] has boosted up explorative investigations on the crystal-chemistry and low-temperature physical properties of novel intermetallic phases in the U-Co-Ge ternary system. These efforts resulted in the characterization of six intermediate phases, which have hitherto been reported in...
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  5. 21. Resonant inelastic X-ray scattering probe of inter- and intra-atomic interactions in uranium systems
    Dr Kristina Kvashnina (ESRF)
    28/03/2010, 11:45
    Theory, electronic structure
    oral
    Theory and Spectroscopy I
    A central issue in the investigation of various properties of actinide systems is the nature of the 5f electrons in different systems. Many of the unusual properties found specifically in uranium (U) compounds are thought to be related to the delocalization of the partially filled U 5f electron states and their hybridization with the U 6d-7s states. However, due to the complexity of the...
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  6. 16. Electronic structure and ionicity of actinide oxides from first principles
    Dr Leon Petit (Daresbury Laboratory)
    28/03/2010, 12:05
    The ground-state electronic structures of the actinide oxides AO, A2O3, and AO2
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  7. 23. First-principles study of uranium dioxide and oxygen self-diffusion in uranium dioxide
    Mr BORIS DORADO (CEA CADARACHE)
    28/03/2010, 12:25
    Uranium dioxide UO2 is the standard nuclear fuel used in current pressurized water reactors. The description of this oxide by first-principles calculations remains challenging because of the peculiar properties of the uranium 5f electrons which do not allow the standard LDA or GGA functionals to accurately reproduce its electronic properties. In this study, we use the DFT+U approximation to...
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  8. 56. X-ray absorption and emission spectroscopic study at O K-edges of light actinide oxides
    s m butorin
    28/03/2010, 12:45
    Theory, electronic structure
    oral
    Theory and Spectroscopy I
    X-ray absorption and emission spectroscopic study at O K-edges of light actinide oxides S. M. Butorin,1 A. Modin1, Y. Yun1, M.-T. Suzuki1, J. Vegelius1, L. Werme1, D. K. Shuh2, P. M. Oppeneer1, J. Nordgren1, 1 Depatment of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden, e-mail: sergei.butorin@fysik.uu.se 2 Lawrence Berkeley National Laboratory, Chemical...
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  9. 9. Investigation of uranium-colloid interactions in soil by dual Capillary Electrophoresis / Field-Flow Fractionation hyphenated with Inductively Coupled Plasma-Mass Spectrometry.
    Mrs Céline Claveranne-Lamolère (IPREM/LCABIE and CEA-DAM-DIF)
    28/03/2010, 14:20
    Nuclear fuel cycle, environment
    oral
    Chemistry I
    Uranium is an actinide which naturally occurs in the environment. Its applications (civilian nuclear industry, agriculture, military applications, etc…) have induced an anthropogenic contamination, particularly in soils. So it is essential to know conditions and understand mechanisms of its transport. According to IUPAC, colloids refer to molecules or polymolecular particles which have in one...
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  10. 35. Uranyl behaviour at the gibbsite-water interface: a Car Parrinello molecular dynamics study
    Mr Sébastien Lectez (CNRS)
    28/03/2010, 14:40
    Nuclear fuel cycle, environment
    oral
    Chemistry I
    In order to understand the various mechanisms involved in the retention of the radionuclides on mineral surfaces, molecular simulations appear as a complementary tool to experiments. In this work, we propose to study the sorption of the solvated uranyl cation UO22+ on an abundant mineral surface, the gibbsite (Al(OH)3. The study of such complex systems may involve finite temperature...
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  11. 2. The Features of Luminol Chemiluminescence in Detection of Trace Amounts of Actinides in Solutions
    Igor Izosimov (Khlopin Radium Institute)
    28/03/2010, 15:00
    Nuclear fuel cycle, environment
    oral
    Chemistry I
    A widespread application of tunable lasers to analytical problems gave impetus to development of new procedures for detection of trace amounts of a substance in various media. A capability to vary the wavelength of laser radiation allows selective action on atoms and molecules and also their selective detection. From the practical standpoint, liquids are the most suitable for analysis since...
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  12. 46. Low temperature properties of AnFe2Si2 systems (An = Th, Np, Pu)
    Dr jean-christophe griveau (ITU JRC EC)
    28/03/2010, 15:50
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems I
    The ThCr2Si2 (body centered I/4mmm) structure has long been typical of systems presenting striking physical properties. Two compounds presenting this structure, namely CeCu2Si2[1] and URu2Si2[2] are unconventional superconductors, and the nature of the coupling mechanism is still under debate 30 years after their discovery. Here we have focused on Transuranium systems (TU) with this structure...
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  13. 57. Kondo effect in the presence of ferromagnetism in U1–xThxNiSi2
    a p pikul
    28/03/2010, 16:10
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems I
    Kondo effect in the presence of ferromagnetism in U1–xThxNiSi2 (ORAL) Adam P. Pikul and Dariusz Kaczorowski W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P Nr 1410, 50–950 Wrocław 2, Poland; e-mail: A.Pikul@int.pan.wroc.pl The compound UNiSi2 crystallizes with an orthorhombic structure of the CeNiSi2-type and exhibits a ferromagnetic...
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  14. 43. Electrical transport properties of single crystalline U2Cu4As5
    Dr Daniel Gnida (Institute of Low Temperature and Structure Research, Polish Academy of Sciences)
    28/03/2010, 16:30
    Theory, electronic structure
    oral
    Strongly Correlated Systems I
    The ternary uranium arsenide U2Cu4As5 crystallizes with a body-centred tetragonal structure of its own type (space group I4/mmm, lattice parameters: a = 3.990 Ă, b = 24.299 Ă) [1]. Magnetic susceptibility measurements revealed that the compound orders antiferromagnetically at TN = 189 K [1]. The onset of the ordered state is accompanied by a rapid drop in the electrical resistivity [1]. Here,...
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  15. 44. Ferromagnetic ordering in novel ternary germanides: URu1-xGe2 and U34Ru4-xGe33
    Dr Mathieu Pasturel (Sciences Chimiques de Rennes)
    28/03/2010, 16:30
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems I
    Several binary or ternary uranium based germanides have been reported to exhibit superconductivity at low temperatures, that emerges either from paramagnetic state (e.g. U7Ge, U5Ge3 [1]) or from ferromagnetically ordered state, in ambient pressure conditions (e.g. URhGe [2], UCoGe [3]) or under applied hydrostatic pressure (e.g. UGe2 [4]). In the search for other germanides with interesting...
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  16. 11. Quadrupolar interactions in UPd3 observed by inelastic neutron scattering
    Dr Manh Duc Le (Helmholtz Zentrum Berlin für Materialen und Energie)
    29/03/2010, 09:20
    UPd3 is a rare example of a compound where the low temperature ordered phase involves the alignment of electric quadrupoles of the f-electrons on neighbouring ionic sites, rather than their magnetic dipole moments. We show inelastic neutron spectra of the dispersion of crystal field excitations in UPd3, which are consistent with RPA calculations assuming quadrupolar exchange interactions...
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  17. 19. Specific heat of the antiferro / ferro-magnet NpGa3
    Dr eric colineau (European Commission)
    29/03/2010, 09:40
    The actinide compounds AnX3, where X is an element from Group IIIA or IVA, crystallize in the cubic AuCu3 structure. They are characterized by an actinide-actinide interatomic distance far above the Hill limit, therefore 5f–ligand hybridization is the main mechanism responsible for the delocalization of the 5f electrons. The systematic of this hybridization has been well demonstrated for the...
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  18. 40. Magnetic ordering in the heavy-fermion compound UZn12
    Dr António Pereira Gonçalves (Instituto Tecnológico e Nuclear)
    29/03/2010, 10:00
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems II
    Magnetic ordering in the heavy-fermion compound UZn12 A.P. Gonçalves1,*, D. Gnida2, P. Estrela3,4, A. de Visser4, E.B. Lopes1, I. Catarino5, G. Bonfait5, M. Godinho6, M. Almeida1, D. Kaczorowski2 1 Dep. Química, Instituto Tecnológico e Nuclear, P-2686-953 Sacavém, Portugal. 2 Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O.Box 1410, 50-950 Wroclaw,...
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  19. 7. Pressure effect on the crystal lattice of unconventional superconductor UCoGe.
    Ms Anna Maria Adamska (AGH University of Science and Technology)
    29/03/2010, 10:00
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems II
    Several unconventional superconductors, i.e. those where non-phonon mediated superconductivity is considered, can be found among U-based compounds. Such materials occur at the onset of magnetic order, and magnetic fluctuations have to be considered as a key ingredient of a pairing mechanism. A recently investigated example of such an unconventional compound is UCoGe, reported to be a weak...
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  20. 12. Electrical properties of (Pu,Lu)Pd3
    Dr Manh Duc Le (Helmholtz Zentrum Berlin für Materialen und Energie)
    29/03/2010, 10:45
    Strongly correlated behaviours, superconductivity, quantum criticality
    poster
    Introductions to Posters
    We present the resistivity and Hall coefficient of the heavy fermion compound PuPd3 and its solid solution with LuPd3. A simple crystal field model of conduction s-electrons scattering off local f-electron moment was found to describe the low temperature behavior of the resistivity. This model suggests that the s-f exchange interaction as well as the inter f-electron interactions decrease with...
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  21. 63. High temperature drop calorimetry for actinide samples
    octavian valu
    29/03/2010, 10:50
    Inorganic, organometallic chemistry
    poster
    Introductions to Posters
    High temperature drop calorimetry for actinide samples Octavian S. Vălu1,2, Markus Beilmann2, Ondrej Beneš2 and R. J. M. Konings2 1 ”Al. I. Cuza” University, Department of Chemistry, 11 – Carol I Blvd., 700506 – Iaşi, Romania, e-mail: octavian.valu@yahoo.com 2 European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe, Germany Using a Setaram...
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  22. 41. Considerations on the U-Fe-B ternary system
    Dr António Pereira Gonçalves (Instituto Tevnológico e Nuclear)
    29/03/2010, 10:55
    Materials science, nanomaterials
    poster
    Introductions to Posters
    Considerations on the U-Fe-B ternary system M. Dias1,2, I.C. Santos1, P.A. Carvalho2, M.Bohn3, O. Tougait4, H. Noël4, A.P. Gonçalves1 1Dep. Química, Instituto Tecnológico e Nuclear/CFMC-UL, P-2686-953 Sacavém, Portugal 2Dep. Eng. Materiais, Instituto Superior Técnico, Av Rovisco Pais, 1049-001 Lisboa, Portugal 3Departement DRO/Geosciences Marines, Ifremer Centre de Brest, B.P....
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  23. 39. Crystallographic study of new phases from the U–Zn–Al ternary system
    Yuriy Verbovytskyy (Instituto Tecnológico e Nuclear)
    29/03/2010, 11:00
    Inorganic, organometallic chemistry
    poster
    Introductions to Posters
    Crystallographic study of new phases from the U–Zn–Al ternary system Yu.V. Verbovytskyy, A.P Gonçalves Departamento de Química, Instituto Tecnológico e Nuclear/CFMC–UL, 2863–953 Sacavém, Portugal yuryvv@bigmir.net Uranium based intermetallic compounds have been intensively studied due to their unusual ground states and behaviours (as intermediate valence states, heavy fermion...
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  24. 38. High-field metamagnetism in UCo2Si2
    Yurii Skourski (Hochfeld-Magnetlabor Dresden, FZ Dresden-Rossendorf, D-01314 Dresden, Germany)
    29/03/2010, 11:05
    Strongly correlated behaviours, superconductivity, quantum criticality
    poster
    Introductions to Posters
    UCo2Si2 belongs to a wide group of UT2X2 compounds, where T is a late d metal and X is Si or Ge. They exhibit a large variety of magnetic states starting from antiferromagnetic (AF) ordering for UCr2Si2, ferrimagnetic (UNi2Si2) and ferromagnetic (F) structures (UCu2Si2) through Pauli paramagnets (UFe2Si2) to compounds, which become superconducting inside an AF state (URu2Si2) [1-3]. UCo2Si2...
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  25. 32. Initial electron back-scattered diffraction observations of Ce-La alloy
    Dr Thomas Scott (University of Bristol)
    29/03/2010, 11:10
    Materials science, nanomaterials
    poster
    Introductions to Posters
    Experimental surrogates for Plutonium may provide an effective means to help understand and model some of the many complex metallurgical issues concerning material. Cerium, located in the lanthanide family of the periodic table, is considered to be a non-radioactive surrogate of Pu because of the several similarities between the two metals including similar crystal structures (fcc), multiple...
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  26. 33. Distribution of soil-to-plant transfer factors for the natural uranium isotopes in the vegetation in zones affected by uranium mines
    Mrs Carmen Ileana Cristache (IFIN-HH)
    29/03/2010, 11:15
    Nuclear fuel cycle, environment
    poster
    Introductions to Posters
    Gamma ray spectrometry and ICP-MS methods were investigated in vegetation samples, collected from the surface tailing, near a uranium mine, located in the Baita region , West part of Romania. The main goal of this investigation was to determine distribution of soil-to-plant transfer factors for the natural uranium isotopes and to compare the experimental results obtained between this methods....
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  27. 42. Long-term behavior of thorium-plutonium phosphate-diphosphate solid solutions
    Prof. NICOLAS DACHEUX (ICSM/LIME)
    29/03/2010, 11:20
    Nuclear fuel cycle, environment
    poster
    Introductions to Posters
    Considering several properties of interest, Thorium Phosphate-Diphosphate Th4P6O23 (namely beta-TPD) was considered as a promising matrix for the specific immobilization of actinides. Among its interesting properties, one can note its capability to form solid solutions with high actinides mole loadings, its good sintering capability and its high resistance to aqueous corrosion or to radiation...
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  28. 1. Synthesis and Characterization of Carbide Foams for the SPES target
    Mr Stefano Corradetti (INFN-LNL)
    29/03/2010, 11:25
    Materials science, nanomaterials
    oral
    Introductions to Posters
    Materials used in targets for RIBs production have to satisfy several requirements, related to their capability both to produce specific isotopes with high efficiencies and to withstand harsh operating conditions. Within the SPES group, new carbides with tailored properties are currently studied and developed in order to maximize isotopes production at extreme conditions. In particular,...
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  29. 10. High-pressure hydrogen doping into the UTGe compounds.
    Ms Anna Maria Adamska (AGH University of Science and Technology)
    29/03/2010, 11:30
    Strongly correlated behaviours, superconductivity, quantum criticality
    poster
    Introductions to Posters
    Hydrogenation is a powerful tool capable of changing both crystal structure and magnetic properties of intermetallic compounds. The hydrogen absorption of UTSi compounds (T = Co, Pd, Ni) compounds obtained by direct synthesis from intermetallic precursors at high H2 pressure (pH2 > 100 bar) leads to a notable lattice expansion and an increase of respective magnetic ordering temperatures [1,2]....
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  30. 8. Field-Induced Phase Transitions in UIrGe Probed by Ultrasound Measurements
    Dr Shadi Yasin (Hochfeld-Magnetlabor Dresden, Forschungszentrum Dresden-Rossendorf, Germany)
    29/03/2010, 11:35
    Strongly correlated behaviours, superconductivity, quantum criticality
    poster
    Introductions to Posters
    The Uranium ternary intermetallic material UIrGe belongs to the large family of UTX compounds (T = transition metal and X = Si or Ge) and crystallizes in the orthorhombic TiNiSi-type structure (space group Pnma) [1]. Its isoelectronic analogs URhGe and UCoGe have recently attracted much attention due to exotic coexistence of ferromagnetism and super-conductivity [2,3]. Previous high-field...
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  31. 37. Isothermal section of the U-Fe-Ge ternary system at 900ºC
    Ms Margarida Henriques (Departamento de Química, Instituto Tecnológico e Nuclear/CFMC-UL, 2863-953 Sacavém, Portugal)
    29/03/2010, 11:40
    Materials science, nanomaterials
    poster
    Introductions to Posters
    Investigations on uranium-based ternary intermetallics continue to reveal new phases, with specific structures and rich variety of ground-state properties. In the U-Fe-Ge system the previously reported ternary intermetallic compounds were UFeGe (P21/m, type UFeGe below 500K, and Pnma, type TiNiSi above 500K) [1], UFe2Ge2 (I4/mmm, type ThCr2Si2) [2], UFe6Ge6 (P6/mmm, type YbCo6Ge6) [3], and the...
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  32. 6. Magnetic anisotropy of a UFe5Al7 single crystal
    Alexander Andreev (Institute of Physics AVCR, Prague)
    29/03/2010, 11:45
    Strongly correlated behaviours, superconductivity, quantum criticality
    poster
    Introductions to Posters
    See the andreev_jda10.doc and andreev_jda10.pdf files sent by e-mail.
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  33. 13. On the existence of cerium (IV) orthophosphate, ‘Ce3(PO4)4’
    Mr Adrian Borhan (“Al.I. Cuza” University, Faculty of Chemistry, 11 - Carol I Blvd., 700506 - Iaşi, Romania), Mr Bogdan Apetrachioaiei (“Al.I. Cuza” University, Faculty of Chemistry, 11 - Carol I Blvd., 700506 - Iaşi, Romania)
    29/03/2010, 11:50
    Inorganic, organometallic chemistry
    poster
    Introductions to Posters
    The present study is aimed to elucidate the existence of the ceric orthophosphate by synthesis and characterization of ‘Ce3(PO4)4’ and CePO4. The results obtained indicate a mixed valence in both phosphates obtained, corresponding to nonstoichiometric compounds of cerium in an intermediate oxidation state (molar ratios P/Ce of 1.06 to 1.18). Based on the results obtained, the existence of...
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  34. 24. Synthesis and characterization of MIVSiO4 compounds
    Mr Dan Tiberiu Costin (CEA)
    29/03/2010, 11:55
    Nuclear fuel cycle, environment
    poster
    Introductions to Posters
    Actinides silicates, including coffinite (USiO4), and derived mineral phases obtained either by cationic or anionic substitutions have been widely studied from various points of view (chemistry, geology, radioecotoxicology). Even if some recent studies led to a reproducible method of preparation for synthetic coffinite samples, this family of compounds remains poorly described in terms of...
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  35. 28. Synthesis of nanocrystalline oxide fuel
    Ms Raquel Jovaní Abril (Institute for Transuranium Elements)
    29/03/2010, 12:00
    Materials science, nanomaterials
    poster
    Introductions to Posters
    High-performance ceramics with nanosized microstructures and functionalized porosities provide the technical base for a large variety of applications in many technologies. This type of microstructure of interest in the nuclear field is due to its appearance at the periphery of Light Water Reactor (LWR) UO2 fuel at high burn-up. As shown in the past, the fuel spontaneously transforms to a...
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  36. 34. 234U/238U disequilibrium studies in soil and vegetation samples from tailing dumps
    Dr Mihaela Gladiola Bragea (Institute of Public Health Timisoara)
    29/03/2010, 12:05
    Nuclear fuel cycle, environment
    poster
    Introductions to Posters
    A study is presented on the disequilibrium of uranium isotopes (234U and 238U) in soils and vegetation samples collected near an uranium tailing dump. Factors affecting uptake of uranium by plants, including relationships between these radionuclides in soils and in plants, and the temporal changes of uranium concentrations in different plant species are discussed. The 234U/238U atom ratio can...
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  37. 47. Techniques elaborated for the R&D on fission targets for SPIRAL2
    Ms Botoum Hy (IPN Orsay)
    29/03/2010, 12:10
    Fission products and Radioactive Ion Beam Yields
    poster
    Introductions to Posters
    The SPIRAL2 fission target must fulfill restrictive specifications to ensure an efficient production of neutron-rich isotope beams. The realization of such a target requires a thorough program to develop the appropriate uranium carbide (UCx) material. In particular, the material should provide a high fission yield and allow a fast release of the fissions products. These requirements can only...
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  38. 18. Study of Thorium-Uranium (IV) oxalate dihydrate phase transition through coupled XRD / -Raman
    Dr Nicolas Clavier (ICSM)
    29/03/2010, 14:00
    Inorganic, organometallic chemistry
    oral
    Chemistry II
    The co-precipitation of tetravalent actinides as an oxalate single phase is currently considered as a promising option to improve the homogeneity as well as the sinterability of mixed oxides fuels envisaged in several concepts of Gen-IV nuclear reactors [ ]. Even if actinides oxalates are studied since several decades in this purpose, some uncertainties remain about the associated...
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  39. 20. Study of CeIV1-xLnIIIxO2-x/2 dissolution
    Mr Denis Horlait (ICSM/LIME)
    29/03/2010, 14:20
    Inorganic, organometallic chemistry
    oral
    Chemistry II
    The understanding of dissolution processes of actinides dioxides has become essential for the optimization of reprocessing operations associated to the back-end of nuclear fuel cycle. As several GenIV reactor concepts plan to operate the simultaneous reprocessing of majors and minors actinides (such as AmIII and CmIII) in new fuel elements, we focused a study on the influence of the...
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  40. 22. Influence of crystallization state and microstructure over chemical durability of mixed dioxides
    Mr laurent CLAPAREDE (CEA/DEN/DRCP/SCPS/LC2A)
    29/03/2010, 14:40
    Materials science, nanomaterials
    oral
    Chemistry II
    Influence of crystallization state and microstructure over chemical durability of mixed dioxides L. Claparède 1,2, N. Clavier 2, N. Dacheux 2, R. Podor2, J. Ravaux2 P. Moisy 1 and J. Dauby 1 1 CEA/DEN/DRCP/SCPS/LCA, Site de Marcoule, BP 17171, 30207 Bagnols / Cèze, France, e-mail: Laurent.claparede@cea.fr 2 ICSM, Site de Marcoule, BP 17171, 30207 Bagnols / Cèze, France The...
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  41. 79. Details of poster session
    29/03/2010, 15:20
    1. Magnetic anisotropy of a UFe5Al7 single crystal ANDREEV, Alexander S 2. Field-Induced Phase Transitions in UIrGe Probed by Ultrasound Measurements Dr. YASIN, Shadi 3. High-pressure hydrogen doping into the UTGe compounds. Ms. ADAMSKA, Anna Maria 4. Electrical properties of (Pu,Lu)Pd3 Dr. LE, Manh Duc 5. On the existence of cerium (IV) orthophosphate,...
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  42. 52. Crystal structure and physical properties of NpRh2Sn, a new Np-based ternary compoun
    T. Klimczuk
    30/03/2010, 09:20
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems III
    Crystal structure and physical properties of NpRh2Sn, a new Np-based ternary compound T. Klimczuk,1,2 J.-C. Griveau,1 R. Eloirdi,1 E. Colineau1, and R. Caciuffo1 1 European Commission, Joint Research Center, Institute for Transuranium Elements, Postfach 2340, Karlsruhe, D-76125 Germany, e-mail: Tomasz.Klimczuk@ec.europa.eu 2 Faculty of Applied Physics and Mathematics, Gdansk...
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  43. 30. 237Np Mössbauer effect study of NpPdSn
    Dr Piotr Gaczyński (JRC Institut for Transuranium Elements)
    30/03/2010, 09:40
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems III
    During the past decades ternary actinide-based compounds containing d- and p-electron elements have attracted much attention for their large variety of physical behaviors arising mostly from the hybridization of actinide 5f electrons with s, p and /or d states on neighboring sites. An example of a system with promising physical behavior is the ATX composition where A stands for actinide atoms,...
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  44. 53. Synthesis and magnetic properties of a new ferromagnetic Kondo-lattice system Np2PdGa3
    v h tran
    30/03/2010, 10:00
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Strongly Correlated Systems III
    Synthesis and magnetic properties of a new ferromagnetic Kondo-lattice system Np2PdGa3 Blank line (12 points) V. H. Tran,1 J. -C. Griveau,2 R. Eloirdi,2 W. Miiller, 1 E. Colineau,2 Blank line (12 points) 1 Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland 2European Commission, Joint Research Centre, Institute for...
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  45. 15. Electronic structure theory of Pu-based alloys and compounds: Pu-Am, Pu-Ce-alloys and PuCoGa5
    Dr Alexander Shick (Institute of Physics ASCR, Prague)
    30/03/2010, 11:05
    Theory, electronic structure
    oral
    Theory and Spectroscopy II
    In the present work, we study the electron correlation effects in the electronic structure and spectra of Pu-Am, Pu-Ce alloys and PuCoGa5. We make use of the “local density matrix” approximation (LDMA) to DMFT, that combines the Hubbard-I approximation with the full-potential linearized augmented plane wave (FP-LAPW) method , including self-consistency over the charge density. Calculated PE...
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  46. 54. Electronic structure and magnetic properties of UNi1/2Sb2 compound
    m. werwinski
    30/03/2010, 11:25
    Theory, electronic structure
    oral
    Theory and Spectroscopy II
    Electronic structure and magnetic properties of UNi1/2Sb2 compound Blank line (12 points) M. Werwiński, A. Szajek Blank line (12 points) Institute of Molecular Physics. Polish Academy of Sciences. ul. M. Smoluchowskiego 17. 60-179 Poznań. Poland, e-mail: werwinski@ifmpan.poznan.pl Blank line (12 points) The UNi1/2/2Sb2 compound crystallizes in the tetragonal HfCuSi2 type structure...
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  47. 17. Bulk properties of the ζ-U-Pu phase
    Ladislav Havela (Charles University Prague)
    30/03/2010, 11:45
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Theory and Spectroscopy II
    In the U-Pu phase diagram a mysterious ζ-U-Pu phase exists over a large composition range (35-70 % U). This cubic (rhombohedrally distorted) phase has 10 different crystallographic positions, randomly occupied by U and Pu. When compared with other Pu allotropic phases, its volume density of 18.55 g/cm3 fits about half way between a-(19.92 g/cm3 ) and b-Pu (17.70 g/cm3).This value is much...
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  48. 27. The Schrieffer-Wolff transformation for the S=1 Underscreened Kondo Lattice model : Application to Uranium compounds
    Dr Bernard COQBLIN (CNRS-Univ. Paris-Sud, 91405-Orsay, France)
    30/03/2010, 11:45
    Theory, electronic structure
    oral
    Theory and Spectroscopy II
    The Schrieffer-Wolff transformation for the S=1 Underscreened Kondo Lattice model : Application to Uranium compounds Christopher Thomas1, Acirete S. da Rosa Simoes1, J. R. Iglesias1, C. Lacroix2, N. B. Perkins3, B. Coqblin4 1 Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Brazil. 2 Institut Néel, CNRS-UJF, 38042 Grenoble Cedex 9,...
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  49. 5. CACAO, a laboratory for the production and the characterization fo radioactive thin layers
    Dr Charles-Olivier Bacri (CNRS/IN2P3 Institut de Physique Nucléaire)
    30/03/2010, 14:00
    Materials science, nanomaterials
    oral
    JDA-WAT I
    CACAO, Chimie des Actinides et Cibles radioActives à Orsay, is a project of laboratory for the production and characterization of thin radioactive layers. The project is now launched and almost financed. It should be fully operational by the end 2010. Besides the production of targets, CACAO aims to be a node of a kind of network of laboratories dedicated to find isotopes, but also to...
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  50. 14. Thermodynamic study of the molten salt fast reactor fuel
    Dr Ondrej Benes (EC-JRC-ITU)
    30/03/2010, 14:30
    Materials science, nanomaterials
    oral
    JDA-WAT I
    The Molten Salt Reactor (MSR) is one of the six reactor concepts of the Generation IV (GenIV) initiative. In this concept the fissile material (233U, 235U and 239Pu) is dissolved in the molten fluoride matrix circulating in the primary circuit from the reactor core to the heat exchanger and back. Compared to solid fuel reactors, the advantage of the MSR is the possibility of fuel purification...
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  51. 59. White line of actinide x-ray absorption spectra as a tool for their atomic environment description
    c degueldre
    30/03/2010, 15:00
    Materials science, nanomaterials
    oral
    JDA-WAT I
    White line of actinide x-ray absorption spectra as a tool for their atomic environment description Claude Degueldre,1 Manuel Pouchon1, Goutam Kuri1, Camelia Borca2, Cedric Cozzo1 1 LNM – NES, Paul Scherrer Institute -5232 Villigen, Switzerland, e-mail: claude.degueldre@psi.ch 2 SYN Paul Scherrer Institute -5232 Villigen, Switzerland,, From a recent...
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  52. 31. Oxidative corrosion of carbide inclusions at the surface of uranium metal during exposure to water vapour.
    Dr Thomas Scott (University of Bristol)
    30/03/2010, 15:30
    Materials science, nanomaterials
    oral
    JDA-WAT I
    The interaction between metallic uranium surfaces and water vapour is considered to be most important in regard to the environmental corrosion of the metal. Numerous studies have examined the initial stages of these interactions. However, there have been discrepancies in the published data describing kinetic laws, pressure dependence of the reaction rate constant and activation energies. The...
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  53. 66. Review on UC targets (Invited talk)
    jerry nolen
    30/03/2010, 16:30
    Materials science, nanomaterials
    oral
    JDA-WAT I
  54. 50. Design concerns for future RIB production facilities at TRIUMF
    Dr Colin Morton (TRIUMF)
    30/03/2010, 17:10
    Materials science, nanomaterials
    oral
    JDA-WAT I
    Since the first Workshop on Actinide Targets in 2006, two such targets have been used successfully for RIB production at TRIUMF’s ISAC facility. In a test run in August/September 2008, a uranium oxide target coupled to a surface ionization source was irradiated with ~300 µA•hrs of 500 MeV protons and RIB yields were measured at the ISAC yield station. In a follow-up run, in December 2009, a...
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  55. 49. Development of an actinide target and laser ion-source test-bed at iThemba LABS, South Africa
    Dr Robert Bark (iThemba LABS)
    30/03/2010, 17:40
    Materials science, nanomaterials
    oral
    JDA-WAT I
    The main accelerator of iThemba Laboratory for Accelerator Based Sciences is a K = 200 Separated Sector Cyclotron (SSC). Use of the accelerator is shared by groups engaging in nuclear physics research, radiation therapy and radio-isotope production. The long term plan calls for the addition a high-intensity, K = 70 MeV proton accelerator to the laboratory, to both alleviate over-subscription...
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  56. 3. The SPES project at LNL
    Dr Alberto Andrighetto (INFN - Laboratori di Legnaro)
    30/03/2010, 18:10
    oral
    JDA-WAT I
    The SPES project at Laboratori di Legnaro of INFN (Italy) is concentrating on the production of neutron-rich radioactive nuclei by the Uranium fission at a rate of 10^13 fission/s . The emphasis to neutron-rich isotopes is justified by the fact that this vast territory has been little explored, at exceptions of some decay and in-beam spectroscopy following fission.. The Rare Ion Beam (RIB)...
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  57. 45. Synthesis and first tests at CERN-ISOLDE of UCx targets produced with carbon nanotubes
    Dr Lisa Biasetto (LNL-INFN & Univerisity of Padova)
    31/03/2010, 09:00
    Materials science, nanomaterials
    oral
    WAT-II
    The first online mass separated isotope (ISOL) beam was produced 60 years ago at the Niels Bohr Institute in Copenhagen. Krypton beams were obtained by fission reactions in a large and heated UO2 target positioned at proximity of a neutron converter [1]. Since then a large variety of other targets and primary drivers have been developed and used in several facilities throughout the world. At...
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  58. 61. Synthesis of 244Bk by 11B + 238U reaction for spectroscopic investigations
    s sodaye
    31/03/2010, 09:30
    Materials science, nanomaterials
    oral
    WAT-II
    Synthesis of 244Bk by 11B + 238U reaction for spectroscopic investigations Suparna Sodaye1*, K. Sudarshan1, D. Banerjee2, R. Tripathi1, P. Maheshwari1, D. Dutta1, R. Guin2, R. Palit3, and P.K.Pujari1 1 Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India 2 Radiochemistry laboratory, VECC, 1/AF, Bidhan Nagar, Kolkata, India 3 Tata Institute of Fundamental Research,...
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  59. 0. Production and Characterization of Highly Porous Carbides for the SPES Target
    Dr Lisa Biasetto (LNL-INFN)
    31/03/2010, 10:00
    Materials science, nanomaterials
    oral
    WAT-II
    The development of targets for RIBs production is a challenging field for material scientists, who are asked to develop materials possessing tailored properties in order to: 1) produce the isotopes requested by the specific experiment 2) grant for high release efficiency of the produced isotopes 3) long life of the target during bombardment In addition, the severe operating...
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  60. 36. Investigation of Uranium Materials for a Two-Step Target
    Eugene Spejewski (Oak Ridge Associated Universities)
    31/03/2010, 11:00
    Fission products and Radioactive Ion Beam Yields
    oral
    WAT-II
    Yield determinations of various uranium targets which could be used in the presented concept of a two-stage target.
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  61. 60. Concepts for high power targets of thorium and uranium
    i gomes
    31/03/2010, 11:30
    Fission products and Radioactive Ion Beam Yields
    oral
    WAT-II
    Concepts for high power targets of thorium and uranium Itacil Gomes,1 Jerry Nolen2, John Greene2 1 I.C.Gomes Consulting & Investment Inc, Naperville, IL, USA, e-mail: icgomes@icgomes.com 2 Argonne National Laboratory, Physics Division, Argonne, IL, USA, e-mail: nolen@anl.gov; greene@anl.gov In recent years the high power Radioactive Beam community has had a renewed interest in...
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  62. 29. Uranium Carbide Target for SPIRAL2: fission products effusion optimization studies
    AHMET OZGUMUS (Institut de Physique Nucléaire d’Orsay, UMR 8608 CNRS, Université Paris-Sud 11, Orsay)
    31/03/2010, 12:00
    Fission products and Radioactive Ion Beam Yields
    oral
    WAT-II
    Very recently studies have been started at IPNO within the framework of the SPIRAL2 project to optimize the properties of uranium carbide used as a fission target. The required characteristics of this target are both the high fission production yield and the capability to release the fission products outside the material as fast as possible. The method of production of this material must be...
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  63. 78. Plans For the Production Building at the future Radioactive Ion Beam production laboratory SPIRAL 2 at GANIL and handling of the targets
    Mathieu QUICLET (GANIL)
    01/04/2010, 09:00
  64. 65. use of actinide targets at the HRIBF
    dan stracener
    01/04/2010, 09:30
    Actinide handling
    oral
    WAT-III
  65. 4. Actinide Target Use at ATLAS
    Mr John Greene (Argonne National Laboratory)
    01/04/2010, 10:00
    Actinide handling
    oral
    WAT-III
    Molecular plating provides an efficient method to prepare sources and targets of actinide elements on thick and thin backings. These are required for experiments at the Argonne Tandem Linac Accelerator System (ATLAS) heavy-ion accelerator. Although the technique is simple and fairly reproducible, because of the radioactive nature of the targets, it is vital to record the various parameters...
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  66. 68. Measurements of neutron capture and fission cross-sections on actinides at n_TOF
    Dr Nicola Colonna (INFN Bari)
    01/04/2010, 10:30
  67. 70. Remote and optimized inspection, measurement and handling for radiation areas at CERN.
    01/04/2010, 11:30
  68. 64. Dose coefficients for radiation protection at present and future RIB facilities
    thomas otto
    01/04/2010, 12:10
    Actinide handling
    oral
    WAT-III
  69. 71. Summary and Closure
    01/04/2010, 12:40
  70. 76. Fuels & targets Invited talk (TBC)
  71. 73. Fuels & targets talk I TBC
  72. 74. Fuels & targets talk II (TBC)
  73. 75. Fuels & targets talk III (TBC)
  74. 67. Invited talk (TBC)
  75. 77. Keith Kershaw: Development of equipment and optimized procedures for remote inspection, measurement and handling in radiation areas at CERN
    Keith Kershaw
    Actinide handling
    oral
    The Handling Engineering Group at CERN has undertaken several initiatives to reduce personnel radiation doses incurred during handling and other activities by developing remote handling equipment, optimized handling equipment / procedures as well as remote inspection and measurement devices. The equipment produced and under development will be presented along with some results for radiation...
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  76. 69. NTOF 2
  77. 55. Transport and thermodynamic properties of UFe2Zn20
    P Swatek
    Strongly correlated behaviours, superconductivity, quantum criticality
    oral
    Transport and thermodynamic properties of UFe2Zn20 Przemysław Swatek and Dariusz Kaczorowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland e-mail: P.Swatek@int.pan.wroc.pl Ternary rare-earth-based intermetallic compounds RT2M20 (R = Ce, Gd, Yb; T = d-electron transition metal; M = Zn, Al) crystallize...
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