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Journal Articles

Structural investigation of thorium in molten lithium-calcium fluoride mixtures for salt treatment process in molten salt reactor

Numakura, Masahiko*; Sato, Nobuaki*; Bessada, C.*; Okamoto, Yoshihiro; Akatsuka, Hiroshi*; Nezu, Atsushi*; Shimohara, Yasuaki*; Tajima, Keisuke*; Kawano, Hirokazu*; Nakahagi, Takeshi*; et al.

Progress in Nuclear Energy, 53(7), p.994 - 998, 2011/11

https://doi.org/10.1016/j.pnucene.2011.04.026
 Times Cited Count：13 Percentile：69.55(Nuclear Science & Technology)

X-ray absorption fine structure (XAFS) measurements on thorium fluoride in molten lithium-calcium fluoride mixtures and molecular dynamics (MD) simulation of zirconium and yttrium fluoride in molten lithium-calcium fluoride mixtures have been carried out. In the molten state, coordination number of thorium and inter ionic distances between thorium and fluorine in the first neighbor are nearly constant in all mixtures. However the fluctuation factors (Debye-Waller factor and C$$_3$$ cumulant) increase until $$x$$CaF$$_2$$ = 0.17 and decrease by addition of excess CaF$$_2$$. It means that the local structure around Th$$^{4+}$$ is disordered until $$x$$CaF$$_2$$=0.17 and stabilized over $$x$$CaF$$_2$$ = 0.17. The variation of fluctuation factors is related to the number density of F$$^-$$ in ThF$$_4$$ mixtures and the stability of local structure around Th$$^{4+}$$ increases with decreasing the number density of F$$^-$$ in ThF$$_4$$ mixtures. This tendency is common to those in the ZrF$$_4$$ and YF$$_3$$ mixtures.

Journal Articles

Neutron diffraction study of distorted-triangular-lattice ising-like antiferromagnet TlCoCl$$_{3}$$

Nishiwaki, Yoichi*; Kato, Tetsuya*; Ohara, Yasuaki*; Osawa, Akira*; Todoroki, Norikazu*; Igawa, Naoki; Ishii, Yoshinobu; Iio, Katsunori*

Journal of the Physical Society of Japan, 75(3), p.034707_1 - 034707_8, 2006/03

https://doi.org/10.1143/JPSJ.75.034707
 Times Cited Count：12 Percentile：58.23(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Correlation measurement during ITB degradation phase by using core correlation reflectometer in JT-60U reversed shear plasma

Shinohara, Koji; Yoshino, Ryuji; Nazikian, R.*; Fujita, Takaaki; Kishimoto, Yasuaki

Europhysics Conference Abstracts, 23J, p.405 - 408, 1999/00

no abstracts in English

JAEA Reports

High intensity proton accelerator program

Kaneko, Yoshihiko; Mizumoto, Motoharu; ; Nakahara, Yasuaki; Iwamoto, Akira; Funahashi, Satoru; ; Takeda, Tatsuoki; Hoshi, Michio; Shinohara, Nobuo; et al.

JAERI-M 91-095, 137 Pages, 1991/06

JAERI-M-91-095.pdf:4.2MB

no abstracts in English

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