Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Electronic Structure of Surfaces: Spectroscopy, Surface States

O 46.18: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1A

Characterisation of Beryllides with XPS — •Nicola Helfer, Petra Hansen, Hans Rudolf Koslowski, and Christian Linsmeier — Forschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung – Plasmaphysik, 52425 Jülich

Future fusion reactors need to produce their tritium fuel. A self-sustained fuel cycle requires a neutron multiplier material, e.g. Be, within the breeding blanket. Beryllides are promising materials since their chemical reactivity with structural material is lower than for pure Beryllium [Y. Mishima et al., J. Nucl. Mat. 367–370, 1382 (2007)]. Beside the production process, the thermal stability and phase transitions are of great interest.
Be-metal alloy samples, produced by Wright Air Development Center already in 1959 were available for experimental investigation. The characterisation of the thermal stability of Be12Ta and Be12Ti with x-ray photoelectron spectroscopy (XPS) is presented here. X-ray diffraction measurements are utilised to confirm the crystalline phase of the samples.
Binding energy shifts of the Be 1s states have been observed and are compared to recent Density Functional Theory (DFT) simulations with an all-electron code (FLEUR) [J. Bröder, master thesis, RWTH Aachen 2015].

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