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Powder neutron diffraction study using high-pressure cells at J-PARC/TAKUMI

Abe, Jun; Arima, Hiroshi; Hattori, Takanori ; Sano, Asami  ; Fukazawa, Hiroshi; Utsumi, Wataru; Komatsu, Kazuki*; Arakawa, Masashi*; Iizuka, Riko*; Kagi, Hiroyuki; Okuchi, Takuo*; Ono, Yoshiki*; Sasaki, Shigeo*

We have performed high-pressure neutron diffraction experiments at TAKUMI in J-PARC. Three types of high-pressure devices are used, Paris-Edinburgh Press, Palm cubic anvil cell and NPD-DAC. Optimization of materials such as anvil and pressure medium and developments of collimators have made possible reduction of background and contamination noise. Incident and diffracted neutron beams travel through high-pressure device, which causes attenuation of neutron. We have studied the method of attenuation correction and analyzed crystal structure using corrected neutron diffraction pattern.

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