On the Dynamics and Site Occupation of D Atoms in ? and ? Deuterides of Zr

The vibrational frequencies of D in δ and e deuterides of Zr have been measured by inelastic neutron scattering. From the experimental data analyzed in terms of the generalized vibrational density of states new information on the H(D) potential in Zr have been obtained. Performing an accurate analysis of the high energy range of scattering spectra, the distribution of D atoms on the available interstitial sites in fcc and fct Zr lattices has been studied.