Structure and dynamics of non-crystalline materials at the Institut Laue Langevin

Structure factor determination of amorphous materials by neutron diffraction

“…This article was focused on the structural study of amorphous systems, but it is worth noticing that the main characteristic of thermal neutrons is that they allow us to study simultaneously the structure and dynamics of amorphous systems [16]. It is necessary to note that for dynamical studies the techniques of isotopic or isomorphic substitution must be used carefully, due mainly to the difference in the mass of the substituted atoms.…”

“…in the liquid state). At a first glance, one can see that the structure factor goes to unity for high Q values, as predicted by equation (16). Using mechanical statistics arguments, it can be shown that ρk B T χ T is the low-Q limit for the structure factor [4], where χ T is the isothermal compressibility.…”

“…There are several instruments dedicated to the study of amorphous materials. For instance, at the Institut Laue Langevin (ILL) there is a large suite of instruments for structural and dynamical studies on non-crystalline solids [16]. In particular, for structural studies the available instruments in steady state sources are D4 [17] (ILL) and 7C2 [18] (LLB).…”