Neutron Spectroscopy: Principles and Equipment

The physical and methodical principles of inelastic thermal-neutron scattering as applied for studying condensed matter have been briefly described. The basic information essential for understanding the experimental method is presented in a concise form, accessible for non-specialists. This information concerns the crystal and time-of-flight experimental techniques, the use of coherent and incoherent neutron scattering, the main approaches to the study of the atomic and magnetic dynamics of condensed matter, etc. The actual types of neutron sources and the ways to deliver neutron flux to sample are presented. The main principles of operating neutron spectrometers are briefly described. The available and promising equipment designed to create and change physical conditions on a sample (e.g., temperature, pressure, magnetic field) is also considered.