High-pressure neutron scattering over the ages

Trends in neutron studies at intermediate pressure are considered. They are mostly associated with the broadening of the range of methods (elastic, inelastic, small-angle scattering and depolarization of neutrons) and with the creation of necessary equipment. It is shown that in the studies of pressure-induced and stress-induced transitions, damping of tunnel modes due to elastic stress, and similar problems, a combination of quasi-hydrostatic and purely hydrostatic experimental conditions is essential. Tthe possibilities and perspectives for new trends of studies at intermediate pressure are assessed.