EXPERIMENTAL-STUDY OF PARTIAL VIBRATIONAL-SPECTRA IN AMORPHOUS-ALLOYS

Inelastic neutron scattering study with isotope substitution for Ni ha s been performed on the Ni64Zr36 amorphous alloy. The measurements wer e made for tu;cr samples: (1) natural mixture of Ni isotopes and (2) 9 9.5% enriched Ni-60 isotope (neutron cross sections - 18 barns and 1.0 9 barns, respectively). This has enabled the model-independent reconst ruction of the Ni and Zr partial vibrational densities of states (VDOS s) and total VDOS in the system. Zr spectrum concentrates at lowering frequences and reveals a set of singularities (at similar to 6, 11, 23 meV) as compared to Ni spectrum, which has a more flat character.