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Kishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Manobu*
Journal of Instrumentation (Internet), 10(5), p.C05030_1 - C05030_6, 2015/05
Times Cited Count：6 Percentile：28.31(Instruments & Instrumentation)
Fe by multichannel scaling with a 64 pixel silicon avalanche photodiode linear-array detectorKishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Manobu*
Review of Scientific Instruments, 85(11), p.113102_1 - 113102_5, 2014/11
Times Cited Count：8 Percentile：36.77(Instruments & Instrumentation)
-bearing Mg-perovskite and its crystal chemistry at high pressureMashimo, Izumi*; Otani, Eiji*; Hirao, Naohisa*; Mitsui, Takaya; Masuda, Ryo*; Seto, Makoto*; Sakai, Takeshi*; Takahashi, Suguru*; Nakano, Satoshi*
American Mineralogist, 99(8-9), p.1555 - 1561, 2014/08
Times Cited Count：7 Percentile：24.02(Geochemistry & Geophysics)
ssbauer radiation using synchrotron radiationMasuda, Ryo; Mitsui, Takaya; Kobayashi, Yasuhiro*; Higashitaniguchi, Satoshi*; Seto, Makoto
Japanese Journal of Applied Physics, 48(12), p.120221_1 - 120221_3, 2009/12
Times Cited Count：8 Percentile：33.37(Physics, Applied)A neV-resolution spectrometer using 14.4 keV synchrotron-based Fe Mssbauer radiation has been developed to observe the quasi-elastic scattering by condensed matter. It consists of a Fe
O
nuclear resonant Bragg monochromator and a Fe stainless steel nuclear analyzer. As a feasibility study, the quasi-elastic scattering by supercooled glycerol near its melting point has been observed. The instrumental function of the spectrometer was 42.2 neV. The energy broadening of 11 neV due to the quasi-elastic scattering was observed.
revealed by the absence of an anomaly in 
-polarized phonon dispersionKajimoto, Ryoichi; Sagayama, Hajime*; Sasai, Kenzo*; Fukuda, Tatsuo; Tsutsui, Satoshi*; Arima, Takahisa*; Hirota, Kazuma*; Mitsui, Yukari*; Yoshizawa, Hideki*; Baron, A. Q. R.*; et al.
Physical Review Letters, 102(24), p.247602_1 - 247602_4, 2009/06
Times Cited Count：12 Percentile：59(Physics, Multidisciplinary)
ssbauer spectroscopySeto, Makoto; Masuda, Ryo; Higashitaniguchi, Satoshi*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Inaba, Chika*; Mitsui, Takaya; Yoda, Yoshitaka*
Physical Review Letters, 102(21), p.217602_1 - 217602_4, 2009/05
Times Cited Count：57 Percentile：88.05(Physics, Multidisciplinary)We have developed a new method that yields Mssbauer absorption spectra using synchrotron radiation (SR); this method is applicable for almost all Mssbauer nuclides including those that cannot be measured by previous methods using radioisotope (RI) sources. The Mssbauer spectrum of the 68.752 keV excited state of 
Ge, which cannot be measured using a RI source, was measured using SR. Our results show that this method can be used to perform advanced Mssbauer spectroscopy measurements owing to the excellent features of SR.
Fe Mssbauer radiationMasuda, Ryo; Mitsui, Takaya; Kitao, Shinji*; Higashitaniguchi, Satoshi*; Yoda, Yoshitaka*; Seto, Makoto
Japanese Journal of Applied Physics, 47(10), p.8087 - 8090, 2008/10
Times Cited Count：12 Percentile：44.62(Physics, Applied)A synchrotron-radiation-based neV-resolution spectrometer has been developed using single-line pure nuclear Bragg reflection. The developed optical system consists of two components: a FeBO single crystal near the N
el temperature for producing Fe Mssbauer radiation from synchrotron radiation, and a single-line Mssbauer absorber (Fe-enriched stainless steel foil) for analyzing the energy distribution. As a feasibility study, we have performed the measurement of the Mssbauer radiation diffracted by a Si crystal under ultrasound vibration with the optical system and have successfully observed the neV-range energy modulation due to the ultrasound vibration.
Fe-Mssbauer spectroscopy using focused X-raysMitsui, Takaya; Seto, Makoto; Hirao, Naohisa*; Oishi, Yasuo*; Kobayashi, Yasuhiro*; Higashitaniguchi, Satoshi*; Masuda, Ryo*
Japanese Journal of Applied Physics, Part 2, 46(16), p.L382 - L384, 2007/04
Times Cited Count：12 Percentile：44.48(Physics, Applied)Energy-domain synchrotron radiation Mssbauer spectroscopy was performed by a single-line Mssbauer filtering technique and focusing X-ray optics. Pure nuclear Bragg reflection from a heated FeBO single crystal was used for a neV order bandwidth ultrahigh energy resolution X-ray analyzer. As an example of small target research, the Mssbauer transmission spectrum of polycrystalline iron metal was observed using a diamond anvil cell at multimegabar pressures (252 GPa) for the first time.
FeBO single crystalMitsui, Takaya; Seto, Makoto; Kikuta, Seishi*; Hirao, Naohisa*; Oishi, Yasuo*; Takei, Fumihiko*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Higashitaniguchi, Satoshi*; Masuda, Ryo*
Japanese Journal of Applied Physics, Part 1, 46(2), p.821 - 825, 2007/02
Times Cited Count：33 Percentile：74.29(Physics, Applied)Ultrahigh monochromatic 14.4 keV X-rays with a narrow bandwidth of 15.4 neV were generated successfully with a high counting rate of 12,000 counts/s at the undulator beamline (BL11XU) of SPring-8. It was achieved by combining an intense X-ray from the third generation synchrotron radiation facility SPring-8 and pure nuclear Bragg scattering of a very highquality FeBO perfect single crystal at the Nel temperature. We describe the detailed study of the beam characteristics and some performance test experiments of energy-domain synchrotron radiation Mssbauer spectroscopy, including a highpressure experiment using a diamond anvil cel.
Masuda, Ryo*; Higashitaniguchi, Satoshi*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Seto, Makoto*; Mitsui, Takaya; Yoda, Yoshitaka*; Haruki, Rie*; Kishimoto, Shunji*
Journal of the Physical Society of Japan, 75(9), p.094716_1 - 094716_4, 2006/09
Times Cited Count：2 Percentile：19.46(Physics, Multidisciplinary)no abstracts in English
Mitsui, Takaya; Seto, Makoto; Higashitaniguchi, Satoshi*
no journal, ,
no abstracts in English
Masuda, Ryo; Mitsui, Takaya; Kitao, Shinji*; Higashitaniguchi, Satoshi*; Yoda, Yoshitaka*; Seto, Makoto
no journal, ,
no abstracts in English
Kajimoto, Ryoichi; Sagayama, Hajime*; Sasai, Kenzo*; Fukuda, Tatsuo; Tsutsui, Satoshi*; Arima, Takahisa*; Hirota, Kazuma*; Mitsui, Yukari*; Yoshizawa, Hideki*; Baron, A. Q. R.*; et al.
no journal, ,
Murakami, Haruyuki; Matsui, Kunihiro; Kizu, Kaname; Tsuchiya, Katsuhiko; Yoshida, Kiyoshi; Okuno, Kiyoshi; Obana, Tetsuhiro*; Takahata, Kazuya*; Imagawa, Shinsaku*; Mito, Toshiyuki*; et al.
no journal, ,
no abstracts in English
Mitsui, Seiichiro; Yoshikawa, Hideki; Matsui, Toshiya*; Kaneko, Makoto*; Nakamatsu, Yuki*; Utsunomiya, Satoshi*
no journal, ,
Engineered barrier system for geological disposal of high level nuclear waste in Japan consists of vitrified waste, metal overpack and clay buffer material. Although the overpack and the buffer material are designed to prevent the release of radionuclides from the vitrified waste, some experimental studies have shown that these components can promote glass dissolution. To gain insight in the long-term behavior of the vitrified waste at the glass-iron interface in the geological repository conditions, we studied sand contacted with iron cannon retrieved from Kaiyo Maru, a warship of the Tokugawa Shogunate that sank off the coast of Esashi in Hokkaido, 1868, as an archaeological analog. In this paper, we discuss type of corrosion and alteration products characterized by microanalyses, such as transmission electron microscope, and clogging of sand voids analyzed by a micro-focus X-ray computed tomography.
