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High‐Temperature Investigation of the Dynamics and Thermodynamics of ZrH–U System by Neutron Scattering
Author(s) -
Padureanu I.,
Rapeanu S.N.,
Kozlov Zh.A.,
Semenov V.A.,
Radulescu A.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200102)223:3<831::aid-pssb831>3.0.co;2-s
Subject(s) - inelastic neutron scattering , debye model , atmospheric temperature range , neutron , scattering , inelastic scattering , atomic physics , thermodynamics , neutron scattering , chemistry , heat capacity , debye , physics , nuclear physics , condensed matter physics , quantum mechanics
Inelastic neutron scattering (INS) measurements of the vibrational frequencies in δ‐Zr hydride containing uranium, ZrH 1.6 U 0.32 , have been performed in the range of high temperatures (between 293 and 973 K) at the DIN‐2PI time‐of‐flight spectrometer at the IBR‐2 pulsed reactor of JINR, Dubna. From the temperature dependence of the generalized vibrational density of states (GVDS), information on the H potential has been obtained. Also the high frequency limit of lattice vibrations as well as the frequency of optical vibrations have been studied as functions of temperature. Starting from basic properties, the main thermodynamic functions, the characteristic Debye and Einstein temperatures and the total specific heat have been derived.