Zobrazeno 1 - 10
of 148
pro vyhledávání: '"S. Heathman"'
Autor:
C.E. Zvoriste-Walters, Arne Janssen, S. Heathman, J. Spino, R. Jovani-Abril, Roberto Caciuffo
Publikováno v:
Journal of Nuclear Materials. 435:123-127
The crystal size dependence of the bulk modulus of nano-crystalline uranium dioxide is investigated by means of in situ high pressure X-ray diffraction. Samples with average particle sizes of 4, 6 and 34 nm as measured from high resolution TEM images
Autor:
Gaël Ménard, Gilles Wallez, Philippe E. Raison, Roberto Caciuffo, Emmanuelle Suard, Rudy J. M. Konings, Karin Popa, Carmen E. Zvoriste, Nicolas Dacheux, Denis Bykov, S. Heathman
Publikováno v:
Physics and Chemistry of Minerals. 39:685-692
The crystal structure of the cheralite—CaTh(PO4)2—has been revisited by neutron diffraction and its behaviour under high pressure investigated by X-ray diffraction up to 36 GPa. The neutron diffraction data at ambient pressure gave a more accurat
Publikováno v:
Physics and Chemistry of Minerals. 37:761-767
The structural behavior under pressure of three lanthanide pyrochlore zirconates Ln2Zr2O7 (Ln3+ = Ce, Nd and Gd) has been investigated by X-ray diffraction up to 50 GPa. For all three compounds, a symmetry reduction from cubic to monoclinic is observ
Publikováno v:
Journal of Alloys and Compounds. :138-141
The changing role of the 5f electrons across the actinide series has been of prime interest for many years. The remarkable behavior of americium's 5f electrons under pressure was determined experimentally a few years ago and it precipitated a strong
Autor:
Michał J. Winiarski, C. Zvoriste-Walters, Tomasz Klimczuk, M. Muras, S. Heathman, Maria Gazda, Jean-Christophe Griveau, Bartlomiej Wiendlocha
Publikováno v:
Physical Review B. 91
Polycrystalline ${\mathrm{Hf}\phantom{\rule{1.0pt}{0ex}}\mathrm{Pd}}_{2}\mathrm{Al}$ has been synthesized using the arc-melting method and studied under ambient-pressure conditions by x-ray diffraction from room temperature up to 450 \ifmmode^\circ\e
Publikováno v:
Intermetallics. 14:483-490
The homogeneity range of R1−xNi2 Laves phases (R=Ce, Gd, Tb) has been studied by X-ray diffraction, microprobe analysis and density measurements. In these compounds, the number of R vacancies varies as a function of the atomic number of the rare ea
Publikováno v:
Journal of Nuclear Materials. 324:189-197
The elastic constants of doped UO 2 simulating a burn-up in the reactor of up to 200 GWd/t M (≃20% U-atoms replaced by fission products) were measured by synchrotron diffraction under high pressure and by Knoop indentation. As a complement, also th
Publikováno v:
Journal of Physics: Condensed Matter. 15:S2297-S2303
The structural behaviour of the actinide metals with pressure is being studied using diamond-anvil cells and the high-brilliance and angle-dispersive techniques now available at the ID30 beamline of the European Synchrotron Radiation Facility. A revi
Publikováno v:
Journal of Nuclear Science and Technology. 39:136-139
The high-pressure phase behavior of americium and curium dioxides has been investigated using diamond anvil cells and X-ray diffraction. Both materials show a phase transition from a cubic (Fm3m) structure to an orthorhombic structure (Prima) at high
Publikováno v:
Journal of Nuclear Science and Technology. 39:45-48
The structural behavior of an Am0.5Cm0.5 alloy has been recently investigated at the High-Pressure-ID30 beamline of the ESRF. The use of synchrotron radiation, diamond anvil cell and 2D detector has allowed us to collect very high quality diffraction