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Report No.

First HT HP liquid data using a high-pressure neutron diffractometer, PLANET, in J-PARC/MLF

Katayama, Yoshinori; Yagafarov, O.*; Hattori, Takanori   ; Chiba, Ayano*; Sano, Asami   ; Saito, Hiroyuki; Suzuya, Kentaro; Otomo, Toshiya*

As the first high-pressure experiments on structurally disordered materials using a newly-built high-pressure neutron diffractometer, PLANET, installed in J-PARC/MLF, measurements of silica glass, a typical oxide glass, were caried out. We compressed a sample in a ZrO$$_{2}$$ cube using a six-axis press and measured diffraction at pressures of 0.1 MPa, 2.3, 5.5, 7.5 and 9.9 GPa at room temperature. Vanadium sample and empty cell were also measured for the correction of the diffraction intensity. Clean diffraction patterns without diffraction lines from surrounding materials were obtained thanks to the radial collimator system. Measurements on heavy water at room temperature, 100$$^{circ}$$C and 200$$^{circ}$$C at 0.8 GPa were also carried out as the first high-pressure high-temperature liquid measurement using PLANET. Significant temperature dependence of diffraction pattern was observed.



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