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On the one of the practical scientific utilisations of low power research reactor LVR-15 in Řež
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SYSNO ASEP 0517291 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title On the one of the practical scientific utilisations of low power research reactor LVR-15 in Řež Author(s) Mikula, Pavol (UJF-V) RID, ORCID, SAI
Stammers, James H. (UJF-V)
Rogante, M. (IT)
Michalcová, A. (CZ)Number of authors 4 Article number A0015 Source Title European Research Reactor Conference (RRFM 2019). - Brussel : European Nuclear Society, 2019 - ISBN 978-92-95064-31-7 Number of pages 6 s. Publication form Print - P Action European Research Reactor Conference 2019 (RRFM 2019) Event date 24.03.2019 - 28.03.2019 VEvent location Jordan Valley Country JO - Jordan Event type EUR Language eng - English Country BE - Belgium Keywords neutron powder diffraction method ; bent perfect crystal ; neutron diffraction Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GC16-08803J GA ČR - Czech Science Foundation (CSF) Institutional support UJF-V - RVO:61389005 Annotation In our contribution we will focus our attention on the scientific utilisation of one of the beam tubes for plastic deformation studies of metallic polycrystalline samples by a newly developed high-resolution neutron powder diffraction method. The method consists of unconventional triple axis set up employing bent perfect crystal (BPC) monochromator and analyser with a polycrystalline sample in between. After the realisation of focusing conditions in real and momentum space at the
neutron wavelength of 0.162 nm, a high angular resolution down up to FWHM(Dd/d)=2x10-3 was achieved on the standard alpha-Fe(110) sample (2 mm diameter) which then opened the possibility for measurements of small lattice
parameter changes of samples, namely, as a result of a thermomechanical load. The feasibility of the instrument for macro- and microstrain as well as grain size studies is demonstrated on the low carbon shear deformed steel wires and the
powder samples of FeAl plastically deformed by ball milling.Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2020
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