High-resolution Inelastic Neutron Scattering
Neutron scattering is used as a complementary technique to X-ray scattering to probe the structure and behaviour of matter on the atomic scale. Whilst elastic scattering is used primarily to investigate the structure of matter, inelastic scattering can give information about the dynamics of a system down to the energies of phonons and magnons. In the Bragg Institute at ANSTO, PELICAN is a time-of-flight spectrometer with a resolution of 50µeV which can be used to investigate crystal-field states of transition metals or rare earth metals. Additionally, we have recently begun commissioning a cold neutron backscattering spectrometer, EMU, with an instrument resolution of just 1µeV. This resolution is sufficient to observe the hyperfine splitting of magnetic nuclei, quantum rotational tunnelling of methyl groups and diffusive dynamics in proteins, for example. We invite standard proposals for experiments on PELICAN prior to the next submission deadline on 15th March, and friendly users to donate test samples for EMU, as preparation for opening the instrument to the broader scientific user community.