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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

 Times Cited Count:8 Percentile:41.01(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

 Times Cited Count:2 Percentile:9.19(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

 Times Cited Count:3 Percentile:70.01

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

 Times Cited Count:2 Percentile:20.48(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

 Times Cited Count:19 Percentile:63.84(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.

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

 Times Cited Count:3 Percentile:26.75(Physics, Multidisciplinary)

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

 Times Cited Count:55 Percentile:87.94(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

 Times Cited Count:7 Percentile:30.12(Physics, Applied)

no abstracts in English

Journal Articles

Development of neV-resolution spectroscopy using synchrotron-based $$^{57}$$Fe M$"o$ssbauer radiation

Masuda, 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:44.67(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 $$^{57}$$FeBO$$_{3}$$ single crystal near the N$'e$el temperature for producing $$^{57}$$Fe M$"o$ssbauer radiation from synchrotron radiation, and a single-line M$"o$ssbauer absorber ($$^{57}$$Fe-enriched stainless steel foil) for analyzing the energy distribution. As a feasibility study, we have performed the measurement of the M$"o$ssbauer 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.

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

 Times Cited Count:2 Percentile:22.31(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

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

 Times Cited Count:33 Percentile:74.36(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

High-energy-resolution monochromator for nuclear resonant scattering of synchrotron radiation by Te-125 at 35.49 keV

Imai, Yasuhiko*; Yoda, Yoshitaka*; Kitao, Shinji*; Masuda, Ryo; Higashitaniguchi, Satoshi*; Inaba, Chika*; Seto, Makoto

Advances in X-ray/EUV Optics and Components II (Proceedings of SPIE Vol.6705), p.670512_1 - 670512_7, 2007/00

We have developed a high-resolution monochromator (HRM) for the measurement of nuclear resonant scattering of synchrotron radiation by $$^{125}$$Te at 35.49 keV using the backscattering of sapphire (9 1 -10 68). The relative energy resolution of $$2.1times10^{-7}$$ is achieved, that is 7.5 meV in energy bandwidth. A new HRM has been desired at this energy region because of the low efficiency of usual Si HRMs. This HRM opens studies on element-specific dynamics and electronic state of substances containing $$^{125}$$Te.

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

 Times Cited Count:2 Percentile:19.49(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Nuclear resonant scattering of synchrotron radiation by $$^{158}$$Gd

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

Journal of the Physical Society of Japan, 74(11), p.3122 - 3123, 2005/11

 Times Cited Count:4 Percentile:32.44(Physics, Multidisciplinary)

We have observed the excitation of the 79.51keV nuclear level of the $$^{158}$$Gd nuclide, which level is not populated by any radioactive precursor, by synchrotron radiation for the first time. The measured excitation energy and the half-life agree with the previously reported results using the neutron capture reactions. Our success in observing the nuclear excitation of $$^{158}$$Gd in a Gd$$_{2}$$O$$_{3}$$ powder sample suggests the following possibilities.1: The study of the local vibrational states and the electronic states of gadolinium contained materials.2: Nuclear-resonant-scattering experiments in the high energy range exceeding 70keV using the third generation synchrotron radiation.

Journal Articles

Flux growth of $$^{57}$$Fe-enriched very high quality iron borate single crystal and observation of magnetic domain structure using X-ray double crystal topography

Mitsui, Takaya; Takei, Fumihiko*; Kitao, Shinji*; Seto, Makoto; Harami, Taikan; Zhang, X.*; Yoda, Yoshitaka*; Kikuta, Seishi*

Transactions of the Materials Research Society of Japan, 30(1), p.7 - 10, 2005/03

no abstracts in English

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

 Times Cited Count:31 Percentile:78.09(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Nuclear resonant inelastic scattering of synchrotron radiation by icosahedral quasicrystal i-Al$$_{62}$$Cu$$_{25.5}$$Fe$$_{12.5}$$ and tetragonal crystal $$omega$$-Al$$_{70}$$Cu$$_{20}$$Fe$$_{10}$$

Suzuya, Kentaro; Shibata, Kaoru*; Seto, Makoto*; Kitao, Shinji*; Yoda, Yoshitaka*; Kashihara, Yasuharu*; Tsai, A.*

Journal of Non-Crystalline Solids, 312-314, p.508 - 512, 2002/10

 Times Cited Count:2 Percentile:30.9(Materials Science, Ceramics)

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

 Times Cited Count:22 Percentile:72.72(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Experimental study of the influence of magnetic phase transition on the M$"o$ssbauer time spectra of the nuclear forward scattering

Mitsui, Takaya; Kitao, Shinji*; Seto, Makoto*; Yoda, Yoshitaka*; Kikuta, Seishi*

Journal of the Physical Society of Japan, 68(12), p.4049 - 4050, 1999/12

 Times Cited Count:3 Percentile:33.45(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Inelastic nuclear resonant scattering of FeCl$$_{3}$$-graphite intercalation compounds

*; Mitsui, Takaya; Harami, Taikan; Yoda, Yoshitaka*; *

Japanese Journal of Applied Physics, 38(SUPPL.38-1), p.535 - 537, 1999/00

 Times Cited Count:0 Percentile:0(Physics, Applied)

no abstracts in English

29 (Records 1-20 displayed on this page)