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Development of a cold-neutron reflectometer (CN REF-V) at the HANARO

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Abstract

A new neutron reflectometer, CN REF-V, has been installed in the cold-neutron laboratory building at the HANARO, a research reactor in Korea. The instrument has a vertical scattering plane and uses a constant wavelength of λ = 4.7535 Å, and it is monochromated by using pyrolytic graphite (PG) crystals. Its measurable minimum reflectivity and maximum momentum transfer for typical solid films are 10-8 and 0.3 Å-1, respectively. A liquid-nitrogen-cooled beryllium filter is used to remove λ/2 contamination due to the PG (002) crystals. With a gold wire activation analysis method, the neutron flux at its sample position was measured and found to be 5.67 × 105 neutrons/cm2 /s. Reflectivity measurements of thin films were successfully carried out with the instrument. A detailed characterization of the instrument and the results of the reflectivity measurements are described.

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Lee, JS., Koo, J., So, JY. et al. Development of a cold-neutron reflectometer (CN REF-V) at the HANARO. Journal of the Korean Physical Society 67, 1574–1582 (2015). https://doi.org/10.3938/jkps.67.1574

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  • DOI: https://doi.org/10.3938/jkps.67.1574

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