Abstract
A new neutron reflectometer has been installed at the HANARO, research reactor in Korea. The scattering geometry is horizontal and, as a result, the sample is placed vertically. The wavelength of the incident neutron beam is 2.45 Å, and monochromated by a pyrolytic graphite crystal with a mosaicity of 0.4°. A detection of the incident and reflected neutron beams is via a helium-3 neutron detector. The neutron reflectivities of deuterated polystyrene and SiO 2 thin films were measured using this instrument. A neutron reflectivity as low as 10 −6 was determined. The maximum neutron momentum transfer, Q, reached 0.4 Å −1 for the solid thin films.
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