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Journal Articles

Local structure analysis of DyN-ZrN solid solutions

Yoneda, Yasuhiro; Tsuji, Takuya; Matsumura, Daiju; Okamoto, Yoshihiro; Takaki, Seiya; Takano, Masahide

Physica B; Condensed Matter, 663, p.414960_1 - 414960_9, 2023/08

 Times Cited Count:0 Percentile:0.00(Physics, Condensed Matter)

We performed various synchrotron X-ray measurements to extract local and average structures of DyN-ZrN solid solutions. We performed the nanoscale structural analysis by combining X-ray absorption fine structure and high-energy X-ray diffraction. The DyN-ZrN solid solution has a rock-salt type cubic crystal structure, and there are instabilities such as the chemical order of the metal site and the distribution of the bond length of the nitrogen site.

Journal Articles

Uranium hydroxide/oxide deposits on uranyl reduction

Ouchi, Kazuki; Matsumura, Daiju; Tsuji, Takuya; Kobayashi, Toru; Otobe, Haruyoshi; Kitatsuji, Yoshihiro

RSC Advances (Internet), 13(24), p.16321 - 16326, 2023/05

 Times Cited Count:1 Percentile:15.68(Chemistry, Multidisciplinary)

We clarified the chemical state transformation of deposits following the reduction of uranyl ion (U$$^{rm VI}$$O$$_{2}$$$$^{2+}$$) from the results of electrochemical quartz crystal microbalance, impedance spectra and X-ray absorption fine structure measurements. We propose the following deposition mechanism: (1) U$$^{rm IV}$$ is formed by the disproportionation of U$$^{rm V}$$. (2) U$$^{rm IV}$$ forms U$$^{rm IV}$$ hydroxide deposits, and (3) finally, the hydroxide deposits transform into U$$^{rm IV}$$ oxide, generally having a larger electrical resistance than the former.

Journal Articles

Layered structure in the crystalline adsorption layer and the leaching process of poly(vinyl alcohol) revealed by neutron reflectivity

Miyazaki, Tsukasa*; Miyata, Noboru*; Arima, Hiroshi*; Kira, Hiroshi*; Ouchi, Keiichi*; Kasai, Satoshi*; Tsumura, Yoshihiro*; Aoki, Hiroyuki

Langmuir, 37(32), p.9873 - 9882, 2021/08

 Times Cited Count:7 Percentile:39.05(Chemistry, Multidisciplinary)

Journal Articles

Carbonated nanohydroxyapatite from bone waste and its potential as a super adsorbent for removal of toxic ions

Sekine, Yurina; Nankawa, Takuya; Yamada, Teppei*; Matsumura, Daiju; Nemoto, Yoshihiro*; Takeguchi, Masaki*; Sugita, Tsuyoshi; Shimoyama, Iwao; Kozai, Naofumi; Morooka, Satoshi

Journal of Environmental Chemical Engineering, 9(2), p.105114_1 - 105114_12, 2021/04

 Times Cited Count:12 Percentile:45.25(Engineering, Environmental)

Remediating toxic ion contamination is crucial for protecting human health and the environment. This study aimed to provide a powerful strategy for effectively utilizing bone waste from the food production and preparation industries for removal of toxic ions. Here, we show that immersing pig bone in NaHCO$$_{3}$$ solution produced a carbonated nanohydroxyapatites (C-NHAP). The C-NHAP exhibited high adsorptivity for Sr$$^{2+}$$, Cd$$^{2+}$$, Pb$$^{2+}$$, and Cu$$^{2+}$$. The strontium adsorptivity was about 250 and 4,500 times higher than that of normal bone and synthetic HAP, respectively. The C-NHAP is an eco-friendly, high-performance material that is simple to prepare and should be useful for tackling problems of food waste disposal and environmental pollution.

Journal Articles

Mechanism of improved ductility of 1500 MPa-class ultra-high strength cold-rolled steel sheet produced by rolling and partitioning method

Hosoya, Yoshihiro*; Matsumura, Yuta*; Tomota, Yo*; Onuki, Yusuke*; Harjo, S.

ISIJ International, 60(9), p.2097 - 2106, 2020/09

 Times Cited Count:7 Percentile:30.36(Metallurgy & Metallurgical Engineering)

Journal Articles

Detailed structural study on the poly(vinyl alcohol) adsorption layers on a Si substrate with solvent vapor-induced swelling

Miyazaki, Tsukasa*; Miyata, Noboru*; Yoshida, Tessei*; Arima, Hiroshi*; Tsumura, Yoshihiro*; Torikai, Naoya*; Aoki, Hiroyuki; Yamamoto, Katsuhiro*; Kanaya, Toshiji*; Kawaguchi, Daisuke*; et al.

Langmuir, 36(13), p.3415 - 3424, 2020/04

 Times Cited Count:17 Percentile:60.83(Chemistry, Multidisciplinary)

Journal Articles

Mechanism of improved ductility of 1,500 MPa-class ultra-high strength cold-rolled steel sheet produced by rolling and partitioning method

Hosoya, Yoshihiro*; Matsumura, Yuta*; Tomota, Yo*; Onuki, Yusuke*; Harjo, S.

Tetsu To Hagane, 106(3), p.154 - 164, 2020/03

 Times Cited Count:3 Percentile:15.13(Metallurgy & Metallurgical Engineering)

Journal Articles

Elucidation of a heterogeneous layered structure in the thickness direction of poly(vinyl alcohol) films with solvent vapor-induced swelling

Miyazaki, Tsukasa*; Miyata, Noboru*; Asada, Mitsunori*; Tsumura, Yoshihiro*; Torikai, Naoya*; Aoki, Hiroyuki; Yamamoto, Katsuhiro*; Kanaya, Toshiji*; Kawaguchi, Daisuke*; Tanaka, Keiji*

Langmuir, 35(34), p.11099 - 11107, 2019/08

 Times Cited Count:25 Percentile:68.01(Chemistry, Multidisciplinary)

Journal Articles

Local structure analysis of ZrN, and Dy$$_{0.5}$$Zy$$_{0.5}$$N surrogate materials for fast reactor nitride fuel

Yoneda, Yasuhiro; Tsuji, Takuya; Matsumura, Daiju; Okamoto, Yoshihiro; Takaki, Seiya; Takano, Masahide

Transactions of the Materials Research Society of Japan, 42(2), p.23 - 26, 2017/04

ZnN is a possible candidate for the diluent material for nitride fuels containing transuranium elements. Pellets of inert matrix material ZrN, and surrogate nitride fuel material Dy$$_{0.5}$$Zr$$_{0.5}$$N, are fabricated for the purpose of investigating the crystal structure. Lattice parameters of Dy$$_{1-x}$$Zr$$_x$$N followed the Vegard's low, in spite of the large lattice mismatch ($$sim$$ 7%) between DyN and ZrN. Local structure analysis was performed by X-ray absorption fine structure (XAFS) and atomic pair-distribution function (PDF) methods. The Zr-N nearest neighbor bond distance changed as changing the Dy composition. The complex local structure of DyN and ZrN is related to the preferable effects of ZrN.

Journal Articles

Ray florets color and shape mutants induced by $$^{12}$$C$$^{5+}$$ ion beam irradiation in chrysanthemum

Matsumura, Atsushi*; Nomizu, Toshikazu*; Furutani, Noriyuki*; Hayashi, Ken*; Minamiyama, Yasuhiro*; Hase, Yoshihiro

Scientia Horticulturae, 123(4), p.558 - 561, 2010/02

 Times Cited Count:32 Percentile:77.45(Horticulture)

Journal Articles

Experimental studies of shielding and irradiation effects at high energy accelerator facilities

Nakashima, Hiroshi; Sakamoto, Yukio; Iwamoto, Yosuke; Matsuda, Norihiro; Kasugai, Yoshimi; Nakane, Yoshihiro; Masukawa, Fumihiro; Mokhov, N.*; Leveling, A.*; Boehnlein, D.*; et al.

Nuclear Technology, 168(2), p.482 - 486, 2009/11

BB2007-3640.pdf:0.22MB

 Times Cited Count:7 Percentile:44.17(Nuclear Science & Technology)

Experimental studies of shielding and radiation effects have been started using 120-GeV proton synchrotron at Fermi National Accelerator Laboratory (FNAL) under collaboration between FNAL and Japan. The first campaign of the experiment was carried out at the Pbar target station and Numi experimental station at FNAL, using antiproton and neutrino production targets irradiated by 120-GeV protons. The generated secondary particles passing through steel, concrete and rock were measured by activation methods as well as by other detectors such as scintillator with a veto counter, phoswich detector and a Bonner ball counter on trial. Preliminary experimental results are presented.

Journal Articles

Dose response and mutation induction by ion beam irradiation in Chrysanthemum

Furutani, Noriyuki*; Matsumura, Atsushi*; Hase, Yoshihiro; Yoshihara, Ryohei; Narumi, Issei

JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 69, 2008/11

no abstracts in English

Journal Articles

Dose response and mutation induction by ion beam irradiation in chrysanthemum

Matsumura, Atsushi*; Furutani, Noriyuki*; Hase, Yoshihiro; Yokota, Yuichiro; Tanaka, Atsushi

JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 78, 2008/03

no abstracts in English

Journal Articles

Beam-palarization asymmetries for the $$p$$($$overrightarrow{gamma}$$,$$K$$$$^{+}$$)$$Lambda$$ and $$p$$($$overrightarrow{gamma}$$,$$K$$$$^{+}$$)$$Sigma$$$$^{0}$$ reactions for $$E$$$$_{gamma}$$=1.5-2.4 GeV

Zegers, R. G. T.*; Sumihama, Mizuki*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Dat$'e$, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; et al.

Physical Review Letters, 91(9), p.092001_1 - 092001_4, 2003/08

 Times Cited Count:128 Percentile:94.70(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Evidence for a narrow $$S$$ = +1 Baryon resonance in photoproduction from the neutron

Nakano, Takashi*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Date, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; Fujiwara, Mamoru; et al.

Physical Review Letters, 91(1), p.012002_1 - 012002_4, 2003/07

 Times Cited Count:1011 Percentile:99.84(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Measurement of gas bremsstrahlung at the SPring-8 insertion device beamline using PWO scintilator

Asano, Yoshihiro; Matsumura, Toru; Chiba, R.*; Hashimoto, Tomoyuki*; Miura, Akio*; Shimizu, Hajime*; Tajima, Yasuhisa*; Yoshida, H.*

Nuclear Instruments and Methods in Physics Research A, 451(2), p.658 - 696, 2000/11

no abstracts in English

Oral presentation

Pair distribution function analysis of simulated nuclear waste glass

Yoneda, Yasuhiro; Tsuji, Takuya; Matsumura, Daiju; Okamoto, Yoshihiro; Nagai, Takayuki

no journal, , 

In order to establish vitrification technology, it is important to clarify how various substances dispersed in glass exist. We made simulated glass by mixing various substances containing metallic element of the platinum group with raw material glass containing SiO$$_2$$-B$$_2$$O$$_3$$ glass as the main component. This simulated glass was heated to 600$$^{circ}$$C just above the melting point and observed by an X-ray diffraction experiment. The obtained X-ray diffraction profile revealed the local structure using the pair distribution function (PDF). Since the network structure of SiO$$_2$$ is strong, it is considered that the precipitated fine particles become wedges and the Si-O bond length is modulated.

Oral presentation

Laser Raman spectroscopic studies on isoploymolybdate(VI) in a highly acidic solution

Saeki, Morihisa*; Yomogida, Takumi; Matsumura, Daiju; Saito, Takumi*; Okamoto, Yoshihiro; Oba, Hironori*

no journal, , 

The structures of isoploymolybdate(VI) were investigated by using laser Raman spectroscopy. The assignment of the Raman spectra showed presence of the [Mo$$_{36}$$O$$_{112}$$(H$$_{2}$$O)$$_{16}$$]$$^{8-}$$ in the 0.2 M HNO$$_{3}$$ and the [Mo$$_{2}$$O$$_{5}$$(H$$_{2}$$O)]$$^{2+}$$ in the 1.0 M HNO$$_{3}$$. To extract the spectrum of the intermediate species, we applied chemometrics analysis to a series of the observed spectra. The analysis revealed presence of one intermediate [Mo(VI)$$_{m}$$O$$_{y}$$]$$^{p}$$ species in the 0.5 M HNO$$_{3}$$. The intermediate species were assigned to [Mo$$_{18}$$O$$_{56}$$(H$$_{2}$$O)$$_{8}$$]$$^{4-}$$ with the aid of X-ray absorption spectroscopy.

Oral presentation

Speciation of isopolymolybdate(VI) in a highly concentrated HNO$$_{3}$$ solution by Raman and EXAFS spectroscopies

Saeki, Morihisa*; Yomogida, Takumi; Matsumura, Daiju; Saito, Takumi*; Nakanishi, Ryuzo*; Tsuji, Takuya; Okamoto, Yoshihiro; Oba, Hironori*

no journal, , 

Speciation of isopolymolybdates in a highly concentrated HNO$$_{3}$$ solution was investigated by Raman spectroscopy and Mo K-edge extended X-ray absorption fine structure (EXAFS). A series of Raman spectra and EXAFS oscillations were analyzed using Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS). The MCR-ALS analysis gives us the fraction profile in change of [Mo$$_{36}$$O$$_{112}$$(H$$_{2}$$O)$$_{16}$$]$$^{8-}$$$$rightarrow$$[Mo$$_{2}$$O$$_{5}$$]$$^{2+}$$$$rightarrow$$[MoO$$_{2}$$]$$^{2+}$$ with the increase of the HNO$$_{3}$$ concentration.

Oral presentation

Assessing oxidation of UO$$_{2}$$ with $$mu$$-Raman spectroscopy and X-ray absorption spectroscopy

Yomogida, Takumi; Ouchi, Kazuki; Matsumura, Daiju; Tsuji, Takuya; Kobayashi, Toru; Kitatsuji, Yoshihiro

no journal, , 

A combination of micro-Raman spectroscopy (MRS), and X-ray absorption spectroscopy was applied to the characterization of uranium dioxide (UO$$_{2+X}$$). A fresh UO$$_{2}$$ immediately after preparation, an aged UO$$_{2}$$ after 30 years storage were employed. In X-ray absorption near edge structure (XANES) spectra, the absorption edge of the aged UO$$_{2}$$ sample was shifted to higher energy. This result indicates that the aged UO$$_{2}$$ was slightly oxidized. Characteristic Raman bands at 447, and 1150 cm$$^{-1}$$ which derived from UO$$_{2}$$ structure were observed in both the flesh and the aged UO$$_{2}$$. The ratio of a Raman peak at 1150 cm$$^{-1}$$ to at 447 cm$$^{-1}$$ of the fresh UO$$_{2}$$ is higher than that of the aged UO$$_{2}$$. These results are showing the applicability of the proposed methods to analyzing the oxidation of UO$$_{2}$$.

29 (Records 1-20 displayed on this page)