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Journal Articles

$$^{61}$$Ni synchrotron radiation-based M$"o$ssbauer spectroscopy of nickel-based nanoparticles with hexagonal structure

Masuda, Ryo*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Kurokuzu, Masayuki*; Saito, Makina*; Yoda, Yoshitaka*; Mitsui, Takaya; Hosoi, Kohei*; Kobayashi, Hirokazu*; Kitagawa, Hiroshi*; et al.

Scientific Reports (Internet), 6, p.20861_1 - 20861_8, 2016/02

https://doi.org/10.1038/srep20861
 Times Cited Count：9 Percentile：40.77(Multidisciplinary Sciences)

Journal Articles

Attempt to measure magnetic hyperfine fields in metallic thin wires under spin Hall conditions using synchrotron-radiation M$"o$ssbauer spectroscopy

Mibu, Ko*; Mitsui, Takaya; Tanaka, Masaaki*; Masuda, Ryo*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Yoda, Yoshitaka*; Seto, Makoto*

Journal of Applied Physics, 117(17), p.17E126_1 - 17E126_4, 2015/05

https://doi.org/10.1063/1.4917189
 Times Cited Count：2 Percentile：9.14(Physics, Applied)

Journal Articles

Development of $$^{125}$$Te synchrotron-radiation-based M$"o$ssbauer spectroscopy

Kurokuzu, Masayuki*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Saito, Makina*; Masuda, Ryo*; Mitsui, Takaya; Yoda, Yoshitaka*; Seto, Makoto*

Hyperfine Interactions, 226(1), p.687 - 691, 2014/04

https://doi.org/10.1007/s10751-013-0995-2
 Times Cited Count：3 Percentile：69.82(Physics, Atomic, Molecular & Chemical)

Journal Articles

$$^{125}$$Te synchrotron-radiation-based M$"o$ssbauer spectroscopy of Fe$$_{1.1}$$Te and FeTe$$_{0.5}$$Se

Kurokuzu, Masayuki*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Saito, Makina*; Masuda, Ryo*; Mitsui, Takaya; Yoda, Yoshitaka*; Seto, Makoto*

Journal of the Physical Society of Japan, 83(4), p.044708_1 - 044708_4, 2014/04

https://doi.org/10.7566/JPSJ.83.044708
 Times Cited Count：2 Percentile：20.41(Physics, Multidisciplinary)

Journal Articles

Synchrotron radiation-based M$"o$ssbauer spectra of $$^{174}$$Yb measured with internal conversion electrons

Masuda, Ryo*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Kurokuzu, Masayuki*; Saito, Makina*; Yoda, Yoshitaka*; Mitsui, Takaya; Iga, Fumitoshi*; Seto, Makoto

Applied Physics Letters, 104(8), p.082411_1 - 082411_5, 2014/02

https://doi.org/10.1063/1.4866280
 Times Cited Count：21 Percentile：65.2(Physics, Applied)

A detection system for synchrotron-radiation (SR)-based M$"o$ssbauer spectroscopy was developed to enhance the nuclear resonant scattering counting rate and thus increase the available nuclides. In the system, a windowless avalanche photodiode (APD) detector was combined with a vacuum cryostat to detect the internal conversion (IC) electrons and fluorescent X-rays accompanied by nuclear de-excitation. As a feasibility study, the SR-based M$"o$ssbauer spectrum using the 76.5 keV level of $$^{174}$$Yb was observed without $$^{174}$$Yb enrichment of the samples. The counting rate was five times higher than that of our previous system, and the spectrum was obtained within 10 h. This result shows that nuclear resonance events can be more efficiently detected by counting IC electrons for nuclides with high IC coefficients. Furthermore, the windowless detection system enables us to place the sample closer to the APD elements and is advantageous for nuclear resonant inelastic scattering measurements. Therefore, this detection system can not only increase the number of nuclides accessible in SR-based M$"o$ssbauer spectroscopy but also allows the nuclear resonant inelastic scattering measurements of small single crystals or enzymes with dilute probe nuclides that are difficult to measure with the previous detection system.

JAEA Reports

Construction of a car-borne survey system for measurement of dose rates in air; KURAMA-II, and its application

Tsuda, Shuichi; Yoshida, Tadayoshi; Nakahara, Yukio; Sato, Tetsuro; Seki, Akiyuki; Matsuda, Norihiro; Ando, Masaki; Takemiya, Hiroshi; Tanigaki, Minoru*; Takamiya, Koichi*; et al.

JAEA-Technology 2013-037, 54 Pages, 2013/10

JAEA-Technology-2013-037.pdf:4.94MB

JAEA has been performing dose rate mapping in air using a car-borne survey system KURAMA-II. The KURAMA system is a GPS-aided mobile radiation monitoring system that has been newly developed by Kyoto University Research Reactor Institute in response to the nuclear disaster. The KURAMA system is composed of an energy-compensated scintillation survey meter for measuring dose rate, electric device for controlling both the dose rates and the position data from a GPS module, a computer server for processing and analyzing data from KURAMA, and client PCs for providing for end users. The KURAMA-II has been improved in small-packaging, durability, and automated data transmission. In consequence, dose rate mapping in wide area has become possible in shorter period of time. This report describes the construction of KURAMA-II, its application and a suggestion of how to manage a large number of KURAMA-II.

Journal Articles

M$"{o}$ssbauer study on the SmFe$$_2$$ hydride through $$^{149}$$Sm and $$^{57}$$Fe

Masuda, Ryo; Mitsui, Takaya; Ito, Keiji*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Seto, Makoto

Journal of the Physical Society of Japan, 81(3), p.034714_1 - 034714_6, 2012/03

https://doi.org/10.1143/JPSJ.81.034714
 Times Cited Count：3 Percentile：26.68(Physics, Multidisciplinary)

Journal Articles

A Spectrometer for rayleigh scattering of M${"o}$ssbauer radiation using synchrotron radiation

Masuda, Ryo; Mitsui, Takaya; Kobayashi, Yasuhiro*; Higashitaniguchi, Satoshi*; Seto, Makoto

Japanese Journal of Applied Physics, 48(12), p.120221_1 - 120221_3, 2009/12

https://doi.org/10.1143/JJAP.48.120221
 Times Cited Count：8 Percentile：33.37(Physics, Applied)

A neV-resolution spectrometer using 14.4 keV synchrotron-based $$^{57}$$Fe M${"o}$ssbauer radiation has been developed to observe the quasi-elastic scattering by condensed matter. It consists of a $$^{57}$$Fe$$_2$$O$$_3$$ nuclear resonant Bragg monochromator and a $$^{57}$$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.

Journal Articles

Synchrotron-radiation-based M$"o$ssbauer spectroscopy

Seto, 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

https://doi.org/10.1103/PhysRevLett.102.217602
 Times Cited Count：57 Percentile：88.05(Physics, Multidisciplinary)

We have developed a new method that yields M$"o$ssbauer absorption spectra using synchrotron radiation (SR); this method is applicable for almost all M$"o$ssbauer nuclides including those that cannot be measured by previous methods using radioisotope (RI) sources. The M$"o$ssbauer spectrum of the 68.752 keV excited state of $$^{73}$$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 M$"o$ssbauer spectroscopy measurements owing to the excellent features of SR.

Journal Articles

Conversion electron and X-ray M$"o$ssbauer spectroscopies using synchrotron radiation

Mitsui, Takaya; Seto, Makoto; Masuda, Ryo; Kobayashi, Yasuhiro*; Kitao, Shinji*

Japanese Journal of Applied Physics, 47(9), p.7136 - 7139, 2008/10

https://doi.org/10.1143/JJAP.47.7136
 Times Cited Count：7 Percentile：30.06(Physics, Applied)

no abstracts in English

Journal Articles

M$"o$ssbauer spectroscopic evidence on the heme binding to the proximal histidine in unfolded carbonmonoxy myoglobin by guanidine hydrochloride

Harami, Taikan*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Mitsui, Takaya

Hyperfine Interactions, 181(1-3), p.179 - 187, 2008/01

https://doi.org/10.1007/s10751-008-9711-z
 Times Cited Count：2 Percentile：22.28(Physics, Atomic, Molecular & Chemical)

The unfolded heme structure in myoglobin is controversial because of no chance of direct X-ray structure analyses. The unfolding of carbonmonoxy myoglobin (MbCO) by guanidine hydrochloride (GdnHCl) was studied by the M$"o$ssbauer spectroscopy. The spectra show the presence of a sort of spectrum in the unfolded MbCO, independent on the concentration of GdnHCl from 1 to 6 M and the increase of the fraction of unfolded MbCO, depending on the GdnHCl concentration. The isomer shift of the iron of heme in the unfolded MbCO was identified to be different from that of the native MbCO as the globin structure in Mb collapses under the unfolded conditions. This result and the existing related M$"o$ssbauer data proved that the heme in the unfolded MbCO may remain coordinated to the proximal histidine.

Journal Articles

Synchrotron radiation M$"o$ssbauer spectroscopy using Doppler-shifted 14.4 keV single line $$^{57}$$Fe-M$"o$ssbauer radiation

Mitsui, Takaya; Seto, Makoto; Masuda, Ryo; Kiriyama, Koji; Kobayashi, Yasuhiro*

Japanese Journal of Applied Physics, Part 2, 46(28), p.L703 - L705, 2007/07

https://doi.org/10.1143/JJAP.46.L703
 Times Cited Count：17 Percentile：54.99(Physics, Applied)

Synchrotron radiation M$"o$ssbauer spectroscopy was performed using a pure nuclear Bragg reflection of a $$^{57}$$FeBO$$_{3}$$ singlecrystal at the N$'e$el temperature and a Bragg reflection of an oscillating Si single crystal. The developed optical systemfor nuclear diffraction could produce a Doppler-shifted 14.4 keV single-line $$^{57}$$Fe-M$"o$ssbauer radiation and it enabled us to observe the energy-domain synchrotron radiation M$"o$ssbauer spectrum with an absorber at rest.

Journal Articles

Ultrahigh-pressure measurement in the multimegabar range by energy-domain synchrotron radiation $$^{57}$$Fe-M$"o$ssbauer spectroscopy using focused X-rays

Mitsui, 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

https://doi.org/10.1143/JJAP.46.L382
 Times Cited Count：12 Percentile：44.48(Physics, Applied)

Energy-domain synchrotron radiation M$"o$ssbauer spectroscopy was performed by a single-line M$"o$ssbauer filtering technique and focusing X-ray optics. Pure nuclear Bragg reflection from a heated $$^{57}$$FeBO$$_{3}$$ single crystal was used for a neV order bandwidth ultrahigh energy resolution X-ray analyzer. As an example of small target research, the M$"o$ssbauer transmission spectrum of polycrystalline iron metal was observed using a diamond anvil cell at multimegabar pressures (252 GPa) for the first time.

Journal Articles

Generation and application of ultrahigh monochromatic X-ray using high-quality $$^{57}$$FeBO$$_{3}$$ single crystal

Mitsui, 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

https://doi.org/10.1143/JJAP.46.821
 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 $$^{57}$$FeBO$$_{3}$$ perfect single crystal at the N$'e$el temperature. We describe the detailed study of the beam characteristics and some performance test experiments of energy-domain synchrotron radiation M$"o$ssbauer spectroscopy, including a highpressure experiment using a diamond anvil cel.

Journal Articles

Nuclear resonant scattering of synchrotron radiation by Yb nuclides

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

https://doi.org/10.1143/JPSJ.75.094716
 Times Cited Count：2 Percentile：19.46(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Development of scanning-type synchrotron radiation m$"o$ssbauer microscope using focused X-ray

Mitsui, Takaya; Kobayashi, Yasuhiro*; Seto, Makoto

Japanese Journal of Applied Physics, Part 1, 43(1), p.389 - 393, 2004/01

https://doi.org/10.1143/JJAP.43.389
 Times Cited Count：11 Percentile：42.77(Physics, Applied)

A scanning-type synchrotron radiation Mossbauer microscope was designed and installed at the nuclear resonance beamline BL11XU of the SPring-8 facility. The focused Mossbauer probe beam ($$Phi$$$$sim$$20$$mu$$m) is obtained by the combination of a high-resolution monochromator, a multilayer X-ray focusing mirror and a pinhole slit. Using this Mossbauer microscope, we have performed, for the first time,the synchrotron radiation Mossbauer microscopic measurements of nuclear resonant forward scattering from an iron borate single crystal as a function of the sample position. It was found that the observed Mossbauer time spectra depend on the direction of the local hyper fine magnetic field and the local specimen thickness.

Journal Articles

Site-specific phonon density of states discerned using electronic states

Seto, Makoto; Kitao, Shinji*; Kobayashi, Yasuhiro*; Haruki, Rie*; Yoda, Yoshitaka*; Mitsui, Takaya; Ishikawa, Tatsuo*

Physical Review Letters, 91(18), p.185505_1 - 185505_4, 2003/10

https://doi.org/10.1103/PhysRevLett.91.185505
 Times Cited Count：31 Percentile：78.04(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

$$^{238}$$U and $$^{57}$$Fe M$"o$ssbauer spectroscopic study of UFe$$_{2}$$

Tsutsui, Satoshi; Nakada, Masami; Kobayashi, Yasuhiro*; Nasu, Saburo*; Haga, Yoshinori; Onuki, Yoshichika

Hyperfine Interactions, 133(1-4), p.17 - 21, 2001/11

no abstracts in English

Journal Articles

Nuclear resonance scattering of synchrotron radiation by $$^{40}$$K

Seto, Makoto; Kitao, Shinji*; Kobayashi, Yasuhiro*; Haruki, Rie*; Mitsui, Takaya; Yoda, Yoshitaka*; Zhang, X. W.*; Maeda, Yutaka*

Physical Review Letters, 84(3), p.566 - 569, 2000/07

https://doi.org/10.1103/PhysRevLett.84.566
 Times Cited Count：22 Percentile：72.7(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

$$^{57}$$Fe M$"o$ssbauer spectroscopic study of U$$_{6}$$Fe

Tsutsui, Satoshi; Kobayashi, Yasuhiro*; Nakada, Masami; Nasu, Saburo*; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika

Journal of the Physical Society of Japan, 69(6), p.1764 - 1768, 2000/06

https://doi.org/10.1143/JPSJ.69.1764
 Times Cited Count：2 Percentile：25.4(Physics, Multidisciplinary)

no abstracts in English

31 (Records 1-20 displayed on this page)