Polarised neutrons for materials sciences research at the Australian Nuclear Science and Technology Organisation (ANSTO)
Loading...
Date
2014-02-04
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
Polarised neutron scattering has been used extensively to study magnetism in materials. Diffraction allows us to resolve the distribution and orientation of the magnetic moments down to the atomic scale. Inelastic scattering studies the magnetic excitations. The complex magnetic structure in magnetic nanoparticles is a hot topic for Small Angle Neutron Scattering (SANS). Novel magnetic thin film and multilayer are the subjects of neutron reflectometry. The technique is also increasingly being used to significantly enhance the signal-to-noise ratio in SANS measurement of hydrogen-rich materials. At ANSTO, polarised neutron option is currently available on both the SANS instrument “Quokka” (incident beam) and the reflectometer “Platypus” (incident and scattered beam). Recent technological advance of polarised Helium-3 based neutron spin-filter technique has opened up the possibility of using polarised neutrons on a wider range of instruments. In addition to enhancing the capabilities of Quokka (both incident and scattered beam for hydrogen-rich material and magnetic nanoparticle studies) and Platypus (wide-angle analysis for e.g. patterned magnetic surface structure), we are installing and testing polarised neutron equipment on the diffractometer “Wombat” and inelastic-scattering instruments “Taipan”, “Pelican” and “Sika”. This new capability will become available for experiments from July 2014. Furthermore, a new supermirror polariser is being commissioned on Pelican for polarised inelastic scattering work. In this presentation, examples illustrating the technique and use of polarised neutron scattering and the current status of installation and test on instruments will be provided.
Description
Keywords
Australia, Coherent scattering, Dimensionless numbers, Energy-level transitions, Helium isotopes, Light nuclei, Physical properties, Stable isotopes, Testing, ANSTO
Citation
Lee, W. T., Studer, A., Rule, K., Danilkin, S., Yu, D., Mole, R., Kennedy, S., Gilbert, E., Wood, K., Klose, F., & D'Adam, T. (2014). Polarised neutrons for materials sciences research at the Australian Nuclear Science and Technology Organisation (ANSTO). Paper presented at the 38th Annual Condensed Matter and Materials Meeting 2014, Waiheke Island Resort, Waiheke, Auckland, New Zealand 4th February - 7th February, 2014. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2014/Wagga2014proceedings.pdf