Abstract
In order to obtain more neutrons at the sample position, two Si(1 1 1) plates of W250×H40×T5 mm 3 were stacked and currently succeeded in increasing the flux at the sample position of BIX-III diffractometer with JRR-3M at JAERI, Japan by a factor of 1.6 compared to that of a single Si plate. To improve the data taking efficiency, preliminarily, a multi-wavelength monochromator system of stacked elastically bent perfect Si(1 1 1) and Si(2 2 0) crystals was employed to carry out diffraction experiments of Si powder and a relatively complex single crystal, piperidine cobaloxime. Two wavelengths, λ 1=1.80 Å for Si(2 2 0) and λ 2=2.94 Å for Si(1 1 1) were selected for this experiment. All reflections were collected by a neutron imaging plate detector, and the profiles were found to be symmetric and well defined Gaussians.
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