Abstract
The inelastic neutron scattering (INS) on ZrH x systems ( x=0.38, 0.52 and 0.80) revealed low-frequency excitations located within the energy range 2–10 meV. Besides the lattice vibrations specific to α-HCP metallic Zr and γ-FCO Zr hydride, the fine structure of these excitations is clearly observed. The origin of the new observed peaks is not very clear but a proton tunneling or a resonance effect in α-Zr lattice could be taken into account.
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