REFSANS: Reflectometer and evanescent wave small angle neutron spectrometer

Small angle neutron scattering

Small Angle Neutron Scattering (SANS) is a technique that enables to probe the 3-D structure of materials on a typical size range lying from ∼ 1 nm up to ∼ a few 100 nm, the obtained information being statistically averaged on a sample whose volume is ∼ 1 cm3. This very rich technique enables to make a full structural characterization of a given object of nanometric dimensions (radius of gyrati...

Adapting a triple-axis spectrometer for small angle neutron scattering measurements.

Small angle neutron scattering (SANS) instruments typically cover a q (scattering vector) range from 0.001 to 0.6 A(-1). This range in q is achieved through a combination of cold neutrons (lambda>4 A) and a highly collimated beam. However, as a direct result of the unavailability of a cold source at the Canadian Neutron Beam Centre (CNBC), we have resorted to adapting a triple-axis spectrometer...

Simulation-guided optimization of small-angle analyzer geometry in the neutron backscattering spectrometer SPHERES.

The resolution of neutron backscattering spectrometers deteriorates at small scattering angles where analyzers deviate from exact backscattering. By reducing the azimuth angle range of the analyzers, the resolution can be improved with little loss of peak intensity. Measurements at the spectrometer SPHERES are in excellent agreement with simulations, which proves the dominance of geometric effe...

Introduction to Small-Angle Neutron Scattering and Neutron Reflectometry

4 Analysis of Small Angle Scattering Data 10 4.1 Model Independent Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1.1 The Scattering Invariant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1.2 Porod Scattering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1.3 Guinier Analysis . . . . . . . . . . . . . . . . . . . . . ....

MnO 3 by small angle neutron scattering