High Temperature Investigation of the Dynamics and the Thermodynamics of ZrHU System by Neutron Scattering

Inelastic neutron scattering (INS) measurements of the vabrational frequencies in deltaZr hydride containing uranium, ZrH_{1.6}U_{0.32}, have been performed in the range of high temperatures, between 293 and 973 K, at DIN2PI timeofflight spectrometer, IBR2 pulsed reactor of JINRDubna. From the temperature dependence of the generalized vibrational density of states (GVDS), information about the H potential have been obtained and also high frequency limit of the lattice vibrations and frequency of optical vabrations have been studied as functions of temperature. Starting from the basic properties, the main thermodynamic functions, the characteristic Debye and Einstein temperatures and the total specific heat have been derived