This work explores potential methods for use in the detection and classification of defects within crystal structures via analysis of diffuse scattering data generated by single crystal neutron scattering experiments. The proposed defect detection methodology uses machine learning and image processing techniques to perform image texture analysis on neutron diffraction patterns generated by neut...

The design and performance of the new cold neutron chopper spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge are described. CNCS is a direct-geometry inelastic time-of-flight spectrometer, designed essentially to cover the same energy and momentum transfer ranges as IN5 at ILL, LET at ISIS, DCS at NIST, TOFTOF at FRM-II, AMATERAS at J-PARC, PHAROS at LANSCE, and NEAT at HZB, at ...

Quasielastic neutron scattering experiments and molecular dynamics ~MD! simulations have been used to investigate molecular diffusive motion near the melting transition of monolayers of flexible rod-shaped molecules. The experiments were conducted on butane and hexane monolayers adsorbed on an exfoliated graphite substrate. For butane, quasielastic scattering broader than the experimental energ...

Experimental measurements of elastic neutron scattering from U resonances were used to benchmark neutron scattering models in Monte Carlo transport codes. It was found that the implementation of the free gas model to determine the scattered neutron energy and angle in popular Monte Carlo codes is inaccurate. Differences up to a factor of two in the energy dependent angular distribution were obs...

Using hydrogen and deuterium targets, Compton scattering by the proton and neutron have been studied at the tagged photon beam of the MAMI (Mainz) accelerator using different experimental setups. The theoretical tools for the analysis of the experimental data have been investigated, as there are the nonsubtracted dispersion theory and the theory of quasi-free reactions on the proton and neutron...

The renormalized meson-nucleon couplings are applied to the relativistic optical model of p-208Pb elastic scattering at Tlab = 200MeV. We calculate the strength of the vector potential at nuclear center as varying the neutron radius of 208Pb. The neutron skin thickness Sn is determined in the comparison of the calculated potential with the phenomenological one. We …nd a value Sn = 0:118fm being...

2014 The use of magnetic fields in neutron scattering experimentation is reviewed briefly. Two general areas of application can be distinguished. In one the field acts to change the properties of the scattering sample ; in the second the field acts on the neutron itself. Several examples are discussed. Precautions necessary for high precision polarized beam measurements are reviewed. Revue Phys...

2014 Inelastic neutron scattering experiments have been performed on the intermetallic compounds NdPb3 and NdSn3. Well resolved transitions between crystal field levels were observed at different temperatures and for each compound, two level schemes were possible. Magnetic measurements and elastic neutron scattering experiments were performed to remove this uncertainty. The experimental crystal...

Small-angle neutron scattering (SANS) will be used to determine the structures formed by a surfactant additive to a system of spherical silica particles dispersed in water. The measurements will illustrate the advantage of neutron scattering using contrast variation technique. All aspects of the experiment, from the sample preparation and instrument setup through to the data treatment and inter...