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The Debye Temperature of a Single Crystal Thorium–Uranium Dioxide Alloy
Author(s) -
Dugan Christina L.,
Young Christopher,
Carmona Rodney,
Schneider Mitchell,
Petrosky James C.,
Mann James,
Hunt Eric,
McClory John W.
Publication year - 2018
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800436
Subject(s) - debye model , thorium , uranium , uranium dioxide , crystal (programming language) , debye , alloy , analytical chemistry (journal) , single crystal , materials science , x ray photoelectron spectroscopy , atmospheric temperature range , photoemission spectroscopy , spectroscopy , crystallography , chemistry , condensed matter physics , nuclear magnetic resonance , metallurgy , thermodynamics , physics , chromatography , quantum mechanics , computer science , programming language
The effective Debye temperature (Θ DE) of the surface of a single crystal of U 0.71 Th 0.79 O 2 alloy prepared by hydrothermal synthesis is obtained from temperature‐dependent X‐ray photoemission in the temperature range of 300–623 K. The effective average Debye temperature is determined to be 217 ± 24 K. X‐ray fluorescence (XRF) spectroscopy confirms the crystal's composition as U 0.71 Th 0.79 O 2 . Photoemission spectroscopy reveals both thorium and uranium 4f states, which includes uranium and thorium in 4+ oxidation states. The Debye temperature of the single crystal U 0.71 Th 0.79 O 2 alloy, as measured via photoemission, is lower than urania or thoria literature values, indicating either higher defect scattering or the presence of added vibrational modes within the alloyed sample.