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Miura, Daisuke*; Kumada, Takayuki; Iwata, Takahiro*
Nihon Kessho Gakkai-Shi, 63(4), p.287 - 293, 2021/12
We have developed the spin-contrast-variation neutron powder diffractometry to observe hydrogen atoms in a crystalline sample by polarized neutron and polarized proton in the crystal. L-glutamic acid crystals were dispersed in a deuterated polystyrene matrix containing a polarizing agent. The intensities of the diffraction peaks of the sample changed according to the proton polarization. The spin-contrast-variation neutron powder diffractometry can extract diffraction from hydrogen atoms because of the variation of peak intensities as a function of the proton polarization. This technique is expected to enable analyses of the structures of hydrogen-containing materials that are difficult to determine with conventional powder diffractometry.
Kumada, Takayuki
no journal, ,
no abstracts in English
Kumada, Takayuki
no journal, ,
We installed our DNP apparatus to neutron beamlines for structure analyses. This technique named spin contrast variation (SCV) relies on a property that the scattering power of neutron against proton depends heavily on their relative spin direction. SCV extracts detailed structure information from the polarized neutron scattering that greatly varies with proton polarization of the sample. Whereas only a small number of neutron facilities can handle SCV, we upgrade the SCV technique, and output good research examples to show how to use SCV.
