23 November 1992 Neutron reflectometry and high-resolution imaging
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Abstract
This paper describes the thermal neutron reflectometer recently installed at the Rhode Island Nuclear Science Center (RINSC) and presents first results. The reflectometer utilizes a narrow 'pencil beam' with an adjustable angle of incidence on the horizontal sample surface. It permits reflection studies with the neutron beam slanting upward or downward in the range up to 0.03 radians allowing measurements to be made from above or from below (e.g., through the sample substrate). We report the results of measurements of specular reflectivity for liquid D2O, for Fomblin oil, and for a polarizing super-mirror. These results are in good agreement with expectation. We also discuss a proposed high resolution imaging device for ultracold neutrons ((Delta) Qz equals 10-9 angstroms-1). This resolution would constitute an improvement of two orders of magnitude beyond the currently available techniques. The imaging system utilizes a pair of hyperbolic mirrors and a flat horizontal mirror surface represented by a lake of Fomblin liquid.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
U. Jeng, S. J. Quagliato, L. R. Iyengar, Morris Lowell Crow, S. S. Malik, Albert Steyerl, "Neutron reflectometry and high-resolution imaging", Proc. SPIE 1738, Neutron Optical Devices and Applications, (23 November 1992); doi: 10.1117/12.130644; https://doi.org/10.1117/12.130644
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