NEUWAVE2014

Session

Applications I

7 Apr 2014, 14:00

GATE

Conveners

Applications I

• Michael Schulz
• Javier Santisteban (Centro Atomico Bariloche)

2. Analyzing crystalline structures by means of neutron imaging at pulsed and continuous neutron sources

Mr Steven Peetermans (Paul Scherrer Institut)

07/04/2014, 14:30

When the grains in polycrystalline materials (crystallites) are large enough (compared to the spatial resolution), diffraction of neutrons out of the direct beam depends on whether or not a crystallite in the beam path is oriented as such fulfilling Bragg’s law. Spatial variation in transmission contrast appears across the sample between those grains that do and those that do not. Rotating the...

14. Neutron Depolarisation Imaging Study of the Weak Itinerant Ferromagnet Ni3Al

Philipp Schmakat

07/04/2014, 15:00

Quantum phase transitions (QPT) are phase transitions that are driven by quantum fluctuations instead of thermal fluctuations. In practice this implies that QPTs even occur at zero temperature as a function of non-thermal control parameters such as hydrostatic pressure, magnetic field, uniaxial stress or chemical composition. The weak itinerant ferromagnet Ni3Al is a stoichiometric system,...

1. Wavelength Dependent In-Situ Neutron Radiography Investigations of the Phase Change of Zirconium Oxide and Zirconium Nitride during Air Oxidation

Mr Robert Nshimirimana (Nuclear Energy Corporation of South Africa (NECSA))

07/04/2014, 14:00

Oxygen stabilized metallic zirconium (Zr(O)) reacts with N2 at temperatures between 700 and 1400°C. Post-test examinations at room temperature, however, show a mixed structure consisting of ZrO2 and ZrN. No information is available about which phases are formed during the reaction at these high temperatures. It is possible that both phases are produced directly or that a Zr(O,N)x mixing phase...