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Yogo, Akifumi*; Lan, Z.*; Arikawa, Yasunobu*; Abe, Yuki*; Mirfayzi, S. R.*; Wei, T.*; Mori, Takato*; Golovin, D.*; Hayakawa, Takehito*; Iwata, Natsumi*; et al.
Physical Review X, 13(1), p.011011_1 - 011011_12, 2023/01
Times Cited Count：6 Percentile：90.47(Physics, Multidisciplinary)Matsumoto, Kazuhiko*; Hagiwara, Rika*; Ito, Yasuhiko*; Kohara, Shinji*; Suzuya, Kentaro
Nuclear Instruments and Methods in Physics Research B, 199, p.29 - 33, 2003/01
Times Cited Count：34 Percentile：88.64(Instruments & Instrumentation)The structure of 1-ethyl-3-methylimidazolium bifluoride (EMImF
HF) melt has been analyzed at 333 K by a high-energy synchrotron X-ray diffraction method. The total correlation function of the EMImFHF melt was similar to that of the solid state, indicating that not only the short-range but also the intermediate-range ordering in the solid are partially preserved in the liquid state. The intra-molecular F-F correlation in the anions clearly appears in the total correlation function of the EMImFHF melt, whereas prominent peaks are not observed in the case of a room temperature molten salt, 1-ethyl-3-methylimidazolium fluorohydrogenate (EMImF2.3HF).
Hagiwara, Rika*; Matsumoto, Kazuhiko*; Tsuda, Tetsuya*; Ito, Yasuhiko*; Kohara, Shinji*; Suzuya, Kentaro; Matsumoto, Hajime*; Miyazaki, Yoshinori*
Journal of Non-Crystalline Solids, 312-314, p.414 - 418, 2002/10
Times Cited Count：32 Percentile：85.69(Materials Science, Ceramics)The structures of a series of XF
2.3HF (X= 1-methylimidazolium (MI), 1-ethyl-3-methylimidazolium (EMI), 1-butyl-3-methylimidazolium (BMI), 1-hexyl-3-methyl-imidazolium (HMI)) room temperature molten salts have been investigated by high-energy synchrotron X-ray diffraction technique. The correlation peaks appeared in the total correlation function are mainly ascribed to intra-molecular correlation of alkylimidazolium cations. However, it is suggested that the peak at around 3.6 
is ascribed not only to intra-molecular but also inter-molecular correlation of the cation. The contribution of the latter is also supported by the first sharp diffraction peak of the total structure factor found at almost the same position as that of a Bragg peak in the simulated X-ray diffraction pattern of solid EMIFHF with a layered structure, corresponding to the layer separation of
Hagiwara, Rika*; Matsumoto, Kazuhiko*; Tsuda, Tetsuya*; Kohara, Shinji*; Suzuya, Kentaro; Ito, Yasuhiko*
Proceedings of 6th International Symposium on Molten Salts Chemistry and Technology (MS6), p.136 - 139, 2001/10
no abstracts in English
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PNC TN941 79-142, 41 Pages, 1979/08
Nuclear characteristics on a liquid poison tube have been studied by use of DCA. Reactivity worthes of the poison tube were measured as functions of 10B content in liquid and liquid poison level. Also, radial flux distributions around the poison tube and axial flux distribution in a fuel channel, D
O moderator and poison tube were measured. The results of present experiment are summarized as follows. (1)Excess content of 
B beyond 800 ppm makes no increase in reactivity change. (2)Reactivity change in reference to poison level change in poison tube shows the S curve like the characteristics of control rod. (3)Change of liquid poison level gives a small change for the axial flux distribution in the center of fuel cluster. (4)The depression of thermal neutron flux around the poison tube with black poison remarkedly increases at about 2 cm distant from surface of poison tube. On the other hand, poison tube with gray poison makes small change in gross flux distribution at DO region.
