Uranium chelating ability of decorporation agents in serum evaluated by X-ray absorption spectroscopy

Uehara, Akihiro*; Matsumura, Daiju; Tsuji, Takuya; Yakumaru, Haruko*; Tanaka, Izumi*; Shiro, Ayumi*; Saito, Hiroyuki*; Ishihara, Hiroshi*; Homma-Takeda, Shino*

Analytical Methods, 14(24), p.2439 - 2445, 2022/06

https://doi.org/10.1039/D2AY00565D

Local structure investigations of accumulated damage in irradiated MgAlO

Yoshioka, Satoru*; Tsuruta, Konosuke*; Yamamoto, Tomokazu*; Yasuda, Kazuhiro*; Matsumura, Sho*; Sugiyama, Takeharu*; Oba, Yojiro; Ishikawa, Norito; Kobayashi, Eiichi*; Okudaira, Koji*

Journal of the American Ceramic Society, 103(8), p.4654 - 4663, 2020/08

https://doi.org/10.1111/jace.17101

X-ray absorption near edge structure (XANES) and small-angle X-ray scattering (SAXS) reveal the damaged structures in MgAlO spinel induced by swift heavy ions. SAXS indicates the formation of ion tracks with cylindrical shape with a diameter of 5 nm. XANES indicates the cationic disordering between tetrahedral and octahedral sites by the irradiation. Quantitative analysis of XANES also reveals that cations preferably occupy the octahedral sites at high fluence.

Incorporation of multinuclear copper active sites into nitrogen-doped graphene for electrochemical oxygen reduction

Kato, Masaru*; Muto, Marika*; Matsubara, Naohiro*; Uemura, Yohei*; Wakisaka, Yuki*; Yoneuchi, Tsubasa*; Matsumura, Daiju; Ishibara, Tomoko*; Tokushima, Takashi*; Noro, Shinichiro*; et al.

ACS Applied Energy Materials (Internet), 1(5), p.2358 - 2364, 2018/05

https://doi.org/10.1021/acsaem.8b00491

Large ferroquadrupole moment induced in the octupole-ordered CeLaB revealed by high-resolution X-ray diffraction

Inami, Toshiya; Michimura, Shinji*; Hayashi, Yuya*; Matsumura, Takeshi*; Sera, Masafumi*; Iga, Fumitoshi*

Physical Review B, 90(4), p.041108_1 - 041108_5, 2014/07

https://doi.org/10.1103/PhysRevB.90.041108

We carried out a high-resolution X-ray diffraction experiment on CeLaB. This compound exhibits antiferro-octupole order (AFO) below = 1.4 K, and it is theoretically suggested that ferroquadrupole moments and a resultant rhombohedral deformation are induced in the AFO phase. We observe the splitting of Bragg reflections below and find that the unit cell is rhombohedral with the elongated [111] axis. We also precisely evaluate the magnitude of the induced quadrupole moments from the obtained shear strain and find that the quadrupole moments are not reduced in the AFO phase.

Magnetic-field-induced charge order in the filled skutterudite SmRuP; Evidence from resonant and nonresonant X-ray diffraction

Matsumura, Takeshi*; Michimura, Shinji*; Inami, Toshiya; Hayashi, Yuya*; Fushiya, Kengo*; Matsuda, Tatsuma*; Higashinaka, Ryuji*; Aoki, Yuji*; Sugawara, Hitoshi*

Physical Review B, 89(16), p.161116_1 - 161116_5, 2014/04

https://doi.org/10.1103/PhysRevB.89.161116

The antiferromagnetic ordered phase below = 16.5 K and the unresolved intermediate phase between and (= 14 K) in SmRuP have been studied by resonant and nonresonant X-ray diffraction. In the intermediate phase, nonresonant Thomson scattering with = (1,0,0) is induced by applying a magnetic field. This phenomena is caused by atomic displacements reflecting the charge order in the band, as predicted theoretically. Simultaneously, the antiferromagnetic moment of Sm is enhanced along the field direction, which is considered to reflect the staggered ordering of the - crystal-field states. The present results show that the orbital-dependent - hybridization in association with the nesting instability in the band gives rise to the unconventional charge order similarly with PrRuP and PrFeP.

Double phase-plate setup for chromatic aberration compensation for resonant X-ray diffraction experiments

Inami, Toshiya; Michimura, Shinji*; Matsumura, Takeshi*

Journal of Physics; Conference Series, 425(13), p.132011_1 - 132011_5, 2013/03

https://doi.org/10.1088/1742-6596/425/13/132011

Resonant X-ray diffraction is a powerful tool for detecting ordered structures of charge, magnetic and orbital degrees of freedom. The symmetry of an order parameter is determined by changing the relative orientation between the polarization of incident X-rays and the order parameter. A new method suited for extreme conditions is performed by rotating the incident polarization using a diamond phase plate. A disadvantage of this method is significant loss in intensity for low-energy X-rays. In order to obtain both a high degree of linear polarization and strong X-ray intensity, we have constructed optics that compensates chromatic aberration using two diamond phase plates. In a test experiment in beamline BL22XU at SPring-8, two 300 microns diamond phase plates were used. The obtained linear polarization reached more than 96% at 6.15 keV, showing marked improvement compared to the linear polarization 90% obtained by a single 500 microns phase plate.

Fe-doping effects on magnetism in hole-type superconductors of (Bi,Pb)SrCuO

Hiraka, Haruhiro*; Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; Matsumura, Daiju; Nishihata, Yasuo; Mizuki, Junichiro; Yamada, Kazuyoshi*

Journal of Physics; Conference Series, 200, p.012059_1 - 012059_4, 2010/02

https://doi.org/10.1088/1742-6596/200/1/012059

We studied Fe-dopant effects on spin correlations in BiPbSrCuO. Magnetic neutron elastic scattering, which is absent in a pristine sample, has been observed at incommensurate positions with an incommensurability of 0.2. Surprisingly, this anomalously large follows a linear relation even in the overdoped region, unlike for LaSrCuO. We discuss this specific feature observed in the overdoped phase from a dynamical stripe viewpoint.

Resonant magnetic X-ray diffraction study on successive metamagnetic transitions in TbB

Inami, Toshiya; Owada, Kenji; Matsuda, Yasuhiro*; Ouyang, Z. W.*; Nojiri, Hiroyuki*; Matsumura, Takeshi*; Okuyama, Daisuke*; Murakami, Yoichi*

Journal of the Physical Society of Japan, 78(3), p.033707_1 - 033707_4, 2009/03

https://doi.org/10.1143/JPSJ.78.033707

Development of a real-time thermal neutron monitor and its clinical application

Ishikawa, Masayori*; Ono, Koji*; Matsumura, Akira*; Yamamoto, Tetsuya*; Hiratsuka, Junichi*; Miyatake, Shinichi*; Kato, Itsuro*; Sakurai, Yoshinori*; Kobayashi, Toru*; Kumada, Hiroaki; et al.

Proceedings of 12th International Congress on Neutron Capture Therapy (ICNCT-12), p.397 - 400, 2006/10

An ultraminiature thermal neutron monitor which was named SOF detector (Scintillator with Optical Fiber detector) had been developed for BNCT treatment. We had been experienced 15 clinical trials using SOF detector until the end of 2005, some measurements got good results, and some got unacceptable results. One reason of the unacceptable results was due to dislocation of the detector during treatment. This is because it is difficult to fix the SOF detector on patient's skin without strong sticker. To overcome this problem, a loop-type SOF probe was developed. By using the loop-type SOF detector, fixing on the patient's skin was much easier.

Measurement of radon concentration in groundwater around Yotsugi open pit site

Nagara, Shuichi; Yamamoto, Masahiro*; Koga, Osamu; Takeuchi, Akira; Matsumura, Toshihiro; Takeda, Shinji; Sato, Kazuhiko

JNC TN6420 2004-001, 75 Pages, 2004/03

JNC-TN6420-2004-001.pdf:2.93MB

The radon concentration in groundwater summarized around the Yotsugi open-pit site has been measured from 2002 to 2003 and examined radon observation system built in 2001. Moreover, the maintenance actual result of the radon observation system was summarized.