Neutron brillouin scattering in a metallic glass

Bulk metallic glass-like scattering signal in small metallic nanoparticles.

The atomic structure of Ni-Pd nanoparticles has been studied using atomic pair distribution function (PDF) analysis of X-ray total scattering data and with transmission electron microscopy (TEM). Larger nanoparticles have PDFs corresponding to the bulk face-centered cubic packing. However, the smallest nanoparticles have PDFs that strongly resemble those obtained from bulk metallic glasses (BMG...

Orals Introduction to and some history of Neutron Brillouin Scattering

Anisotropy of small-angle neutron scattering in metallic glasses

2014 SANS in metallic glasses is anisotropic and depends on the orientation of the ribbons. Pd-based melt-spun and Nibased electrochemically deposited glasses exhibit different anisotropies. Both glasses contain scattering centres of the order of 40 nm wide in the ribbon plane. In the melt-spun alloy, the scatterers are very thin along the thickness perpendicular to the substrate. In the deposi...

Brillouin and Umklapp scattering in polybutadiene: comparison of neutron and x-ray scattering.

We report a comparison of high resolution inelastic x-ray Brillouin scattering to coherent inelastic neutron scattering for amorphous deuterated polybutadiene, done for one temperature in the glass phase and another one in the melt. The x-ray scattering proves to be by far the better technique for such a polymer within its present resolution bounds. The neutron scattering allows one to extend t...

Comment on "neutron brillouin scattering study of collective dynamics in a dense He-Ne gaseous mixture".

The dynamic structure factor S(k,omega) of a 77% He and 23% Ne gaseous mixture at T = 39.3 K and total number density n = 15.8 nm(-3) has been measured by inelastic neutron scattering at small angles. In the range of wave vectors studied, 0.7<k/nm(-1)<1.8, we find clear side peaks at frequencies following the hydrodynamic sound dispersion c k of the binary mixture (with c the adiabatic sound sp...