Speaker
Description
The neutron source Institut Laue Langevin in Grenoble, France, maintains a comprehensive range of spectroscopy instruments, designed and optimised specifically for the study of dynamic processes in condensed matter. As a quantum mechanical particle possessing a magnetic moment, the neutron not only allows the observation of mass fluctuations (vibrational excitations, phonons) and mass transport (diffusion of atoms and molecules), but also the characterisation of magnetic excitations, be they due to localised electric crystal fields, individual spin fluctuations or collective magnetic modes.
The spatial and energy scales that can be investigated using neutrons typically range from 0.1 Angstroems to a micrometre and from about one nano- eV to an electronvolt. In order to characterise this wide range of different dynamic processes in condensed matter and to measure specific excitations in an optimised manner a variety of different techniques and spectrometers is utilized.
We discuss the various neutron spectrometer concepts (time-of-flight, three-axis, back-scattering, spin-echo) and the instruments that the ILL makes available to the scientific community, and present the latest developments and scientific results from the ILL’s spectroscopy group.
https://www.ill.eu/en/science-technology/ill-science-groups/spectroscopy/
