Single-crystal neutron structure analyses of molecular crystals at SENJU

大原 高志; 鬼柳 亮嗣; 中尾 朗子*; 宗像 孝司*; 石川 喜久*; 森山 健太郎*; 田村 格良; 金子 耕士

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SENJU at J-PARC is a TOF single-crystal neutron diffractometer designed for precise crystal and magnetic structure analyses under multiple extreme environments, such as low-temperature, high-pressure and high-magnetic field, as well as for taking diffraction intensities of small single crystals with a volume of less than 1.0 mm down to 0.1 mm. Recently, we added four area detectors to SENJU in the obliquely downward direction of the sample position. The additional detectors can cover the blind region in the reciprocal space when measuring a low-symmetry sample and improve the measurement efficiency of low-symmetric molecular crystals. While the primary target materials of SENJU are inorganic crystals such as oxides or alloys, numerous structural studies of molecular crystals have been performed, and many scientific results have been achieved. In this presentation, we show the current situations of diffraction measurements of molecular crystals at SENJU.