Studies of condensed matter by using the time-of-flight spectrometer of very cold neutrons

Comprehensive review of the possibilities of very cold neutrons (UCN) in the study of materials and condensed matter carried out by the staff of NFO LPI led by Y.A. Merkuliev. They developed and installed on the IRT MEPhI reactor a time-of-flight UCN spectrometer (Fig. 1) Original method for studying nanostructure and dynamic properties of simple and complex, magnetic and non-magnetic, ordered and disordered substances has been developed. It can be successfully used even on nuclear reactors with low neutron fluxes. New nuclear data have been obtained. Researches of various materials are carried out. The results of the experiments were used in the development of methods for obtaining new materials with improved macro-properties.