Hydrogen vibrations in the α, β1, β2and γ phases of FeTiHx

The local hydrogen vibrations are measured by inelastic neutron scattering techniques in the FeTiHx system for x=0.06 ( alpha phase), 0.94 ( beta 1 phase), 1.4 ( beta 2 phase) and 1.86 ( gamma phase) as well as a function of temperature in the gamma phase. The spectra exhibit both sharp and broad peaks in the energy range of 60-110 meV and are strongly dependent upon H concentration and temperature.