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Journal Articles

Charged particle and photon interactions with matter; Recent advances, applications, and interfaces

Hatano, Yoshihiko; Katsumura, Yosuke; Mozumder, A.*

Charged Particle and Photon Interactions with Matter; Recent Advances, Applications, and Interfaces, 1045 Pages, 2010/12

The edition of this book has been motivated by strongly positive comments on the former edition of the book with a similar title "Charged Particle and Photon Interactions with Matter. Chemical, Physicochemical, and Biological Consequences with Applications.", eds. A.Mozumder and Y.Hatano, Marcel Dekker, New York (2004), which was motivated by a long term (1985-1995) IAEA-project to survey the basic research of the entitled subjects accomplished in the past 100 years after the big findings of ionizing radiation by Curie and Roentgen. The editors received soon after the publication of the former version the strongly positive comments on it from international academic communities asking them to edit further the latter version to survey further the recent advances with future perspectives, applications, and interfaces. Upon these requests, therefore, this book with 36 chapters has been edited.

Journal Articles

First observation of picosecond kinetics of hydrated electrons in supercritical water

Muroya, Yusa*; Lin, M.; De Waele, V.*; Hatano, Yoshihiko; Katsumura, Yosuke; Mostafavi, M.*

Journal of Physical Chemistry Letters (Internet), 1(1), p.331 - 335, 2010/01

 Times Cited Count:41 Percentile:82.74(Chemistry, Physical)

For the first time, a set-up is performed to carry out picoseconds time-resolved experiments in Supercritical Water (SCW) by pulse radiolysis. The kinetics of the decay of the hydrated electron is measured by transient absorption in the near IR on a time-scale ranging from 50 ps to 6 ns. The decay of the hydrated electrons in supercritical conditions shows a fast component at a short time below 500 ps, depending on the density of SCW. The results show that in SCW the main reaction for the decay of hydrated electron is that with H$$_{3}$$O$$^{+}$$.

Journal Articles

Future perspectives of radiation chemistry

Hatano, Yoshihiko

Radiation Physics and Chemistry, 78(12), p.1021 - 1025, 2009/12

From our recent surveys of the research fields of charged particle and photon interactions with matter, we have obtained the important information on future problems needing more work in these research fields and also on ideas how to activate further scientifically radiation chemistry. The important points to be discussed in this talk, therefore, from the entitled views are, (1) Important core-parts of radiation chemistry should be activated further more, which will not result in producing the community isolated from others. (2) Research fields of physics, chemistry, biology, medicine, and technology in radiation research should interact more scientifically among them with each other. (3) Basic research should interact more with applied research to create overlapped specific areas between them. (4) Interface research fields with radiation chemistry should be produced more with mutually common viewpoints between the two of the ionization and excitation of molecules in matter.

Journal Articles

Future perspectives of radiation chemistry

Hatano, Yoshihiko

Radiation Physics and Chemistry, 78(12), p.1021 - 1025, 2009/12

 Times Cited Count:2 Percentile:19.23(Chemistry, Physical)

Journal Articles

Free radical scavenging and radioprotective effects of carnosine and anserine

Fu, H.*; Katsumura, Yosuke; Lin, M.; Muroya, Yusa*; Hata, Kuniki; Fujii, Kentaro; Yokoya, Akinari; Hatano, Yoshihiko

Radiation Physics and Chemistry, 78(12), p.1192 - 1197, 2009/12

 Times Cited Count:27 Percentile:87.68(Chemistry, Physical)

Journal Articles

Free radical scavenging reactions and antioxidant activities of silybin; Mechanistic aspects and pulse radiolytic studies

Fu, H. Y.*; Lin, M.; Muroya, Yusa*; Hata, Kuniki; Katsumura, Yosuke; Yokoya, Akinari; Shikazono, Naoya; Hatano, Yoshihiko

Free Radical Research, 43(9), p.887 - 897, 2009/09

 Times Cited Count:24 Percentile:50.89(Biochemistry & Molecular Biology)

Journal Articles

Fast repair activities towards dGMP hydroxyl radical adducts by silybin and its analogues

Fu, H.*; Katsumura, Yosuke; Lin, M.; Hata, Kuniki; Muroya, Yusa*; Hatano, Yoshihiko

Journal of Radiation Research, 49(6), p.609 - 614, 2008/11

 Times Cited Count:15 Percentile:48.43(Biology)

The repair activities of silybin (SLB) and its analogues towards the oxidizing deoxyguanosine monophosphate (dGMP) hydroxyl radical adducts are investigated by pulse radiolytic techniques. On pulse irradiation of nitrous oxide saturated 2.0 mM dGMP aqueous solution containing 0.1 mM silybin at neutral pH, the transient absorption spectrum of the dGMP hydroxyl radical adducts decreases with the formation of the phenoxyl radical of silybin within tens of microseconds, indicating that there is a repair reaction between the dGMP hydroxyl radical adduct and silybin. The rate constant of the repair reaction is calculated to be 1.0$$times$$10$$^{9}$$ M$$^{-1}$$s$$^{-1}$$ for silybin. The repair activity of hesperetin (HESP), naringin (NAN) and naringenin (NAR) towards hydroxyl radical adducts of dGMP are also studied.

Journal Articles

Preface, ASR2007; International Symposium on "Charged Particle and Photon Interactions with Matter", November 6-9, 2007

Katsumura, Yosuke; Lin, M.; Yokoya, Akinari; Hatano, Yoshihiko

Radiation Physics and Chemistry, 77(10-12), P. 1119, 2008/10

 Times Cited Count:1 Percentile:83.51(Chemistry, Physical)

As Guest Editors, we publish a special issue of Radiation Physics and Chemistry in conjunction with the ASR2007 Symposium, an international symposium on "Charged Particle and Photon Interactions with Matter" held on November 6-9, 2007 at the Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA) in Tokai.

JAEA Reports

Electrons in condensed media

Mozumder, A.*; Yokoya, Akinari; Katsumura, Yosuke; Hatano, Yoshihiko

JAEA-Review 2008-013, 37 Pages, 2008/06

JAEA-Review-2008-013.pdf:4.08MB

This document is a summary of the lectures or seminar talks by A.Mozumder and his discussion/information exchanges with Y.Hatano, A.Yokoya, and Y.Katsumura. A.Mozumder is an invited fellow of the JSPS Invitation Fellowship Program for Research in Japan (Short-Term) with the host Y.Hatano, and stays in Japan mainly at Advanced Science Research Center (ASRC) of JAEA. The research in this program is entitled "Charged Particle and Photon Interactions with Matter", from which the authors give the title of this document one of the most important reactive species commonly produced in matter from these interactions. This document contains the annotated materials presented at ten seminars given by A.Mozumder during his stay in Japan in this program at JAEA (Tokai and Takasaki) and also at various universities and research institutes, including invited lectures at the International Symposium of ASR2007 held in Tokai and the Annual Discussion Meeting of Radiation Chemistry held in Kyoto.

Journal Articles

Hydrogen production in the $$gamma$$-radiolysis of aqueous sulfuric acid solutions containing Al$$_{2}$$O$$_{3}$$, SiO$$_{2}$$, TiO$$_{2}$$ or ZrO$$_{2}$$ fine particles

Yamada, Reiji; Nagaishi, Ryuji; Hatano, Yoshihiko; Yoshida, Zenko

International Journal of Hydrogen Energy, 33(3), p.929 - 936, 2008/02

 Times Cited Count:14 Percentile:37.21(Chemistry, Physical)

Hydrogen production was studied in the $$gamma$$-radiolysis of aqueous H$$_{2}$$SO$$_{4}$$ solutions containing oxide powder of Al$$_{2}$$O$$_{3}$$, SiO$$_{2}$$, TiO$$_{2}$$ or ZrO$$_{2}$$. The observed yields of final product H$$_{2}$$ increased with relative amounts of oxide powder in the solutions and exhibited a particular H$$_{2}$$SO$$_{4}$$ concentration dependence, which was different for each oxide species and its amount. The addition of a small amount of CH$$_{3}$$OH to a H$$_{2}$$SO$$_{4}$$ aqueous solution with oxide powder was quite effective for increasing the final product yields of H$$_{2}$$. The obtained results revealed that heterogeneous systems composed of oxide powder and aqueous H$$_{2}$$SO$$_{4}$$ solution were more efficient for producing H$$_{2}$$ molecules in $$gamma$$-radiolysis than homogeneous systems without oxides.

Journal Articles

Journal Articles

Radiation-induced catalytic reduction of chromium(VI) in aqueous solution containing TiO$$_{2}$$, Al$$_{2}$$O$$_{3}$$ or SiO$$_{2}$$ fine particles

Nagaishi, Ryuji; Yoshida, Zenko; Yamada, Reiji; Hatano, Yoshihiko

Radiation Physics and Chemistry, 75(9), p.1051 - 1054, 2006/09

 Times Cited Count:7 Percentile:48.03(Chemistry, Physical)JP, H17-065162   Licensable Patent Information Database   Patent publication (In Japanese)

Reduction of chromium(VI) in aqueous neutral or basic solution was promoted by $$gamma$$-ray irradiation in the presence of oxide particles such as TiO$$_{2}$$, Al$$_{2}$$O$$_{3}$$ or SiO$$_{2}$$. The oxide particles behaved as a catalyst, and the efficiency of the Cr(VI) reduction increased with an increase of the irradiation dose irrespective of the initial Cr(VI) concentration. The insoluble Cr(III) oxide formed through the Cr(VI) reduction also acted as the catalyst.

JAEA Reports

Thermal cycle test of elemental mockups of ITER breeding blanket

Yanagi, Yoshihiko*; Kosaku, Yasuo; Hatano, Toshihisa; Kuroda, Toshimasa*; Enoeda, Mikio; Akiba, Masato

JAERI-Tech 2002-046, 45 Pages, 2002/05

JAERI-Tech-2002-046.pdf:2.61MB

no abstracts in English

JAEA Reports

Conceptual design of solid breeder blanket system cooled by supercritical water

Enoeda, Mikio; Ohara, Yoshihiro; Akiba, Masato; Sato, Satoshi; Hatano, Toshihisa; Kosaku, Yasuo; Kuroda, Toshimasa*; Kikuchi, Shigeto*; Yanagi, Yoshihiko*; Konishi, Satoshi; et al.

JAERI-Tech 2001-078, 120 Pages, 2001/12

JAERI-Tech-2001-078.pdf:8.3MB

This report is a summary of the design works, which was discussed in the design workshop held in 2000 for the demonstration (DEMO) blanket aimed to strengthen the commercial competitiveness and technical feasibility simultaneously. The DEMO blanket must supply the feasibility and experience of the total design of the power plant and the materials. This conceptual design study was performed to determine the updated strategy and goal of the R&D of the DEMO blanket which applies the supercritical water cooling proposed in A-SSTR, taking into account the recent progress of the plasma research and reactor engineering technology.

Journal Articles

Nuclear and thermal analyses of supercritical-water-cooled solid breeder blanket for fusion DEMO reactor

Yanagi, Yoshihiko*; Sato, Satoshi; Enoeda, Mikio; Hatano, Toshihisa; Kikuchi, Shigeto*; Kuroda, Toshimasa*; Kosaku, Yasuo; Ohara, Yoshihiro

Journal of Nuclear Science and Technology, 38(11), p.1014 - 1018, 2001/11

 Times Cited Count:23 Percentile:83.66(Nuclear Science & Technology)

no abstracts in English

Oral presentation

Radiation-induced reduction process of hazardous chromium(VI) ion to non-hazardous chromium oxide with the lower oxidation state in aqueous solution - oxide system

Nagaishi, Ryuji; Yamada, Reiji; Hatano, Yoshihiko; Yoshida, Zenko

no journal, , 

Radiation-induced reduction of chromium(VI) ion in aqueous solution was investigated in the presence of small amount of insoluble oxide particle such as TiO$$_{2}$$, Al$$_{2}$$O$$_{3}$$ and SiO$$_{2}$$ by using $$^{60}$$Co $$gamma$$-ray. Solution at pH $$>$$ 1.0, simulating industrial liquid waste, became neutral or basic by adding the oxide particle: the positive shift of pH of solution was dependent on the kind and particle size of oxide. The chromium(VI) ion was successfully reduced in the radiolysis of the neutral or basic solution in the presence of oxide, while not in the absence. These indicate that amount of chromium(VI) reduced by reducing radicals of water radiolysis is almost equal to that of chromium with the lower oxidation state oxidized by the oxidizing radicals in the solution, and that adsorption of chromium to oxide and enhancement in the reduction of chromium(VI) take place in the presence of oxide. The insoluble chromium(III) oxide formed in the reduction of chromium(VI) was also responsible for the reduction. The radiation-induced reduction process of hazardous chromium(VI) with utilizing high-level radioactive wastes as radiation resources was further discussed.

Oral presentation

Hydrogen production in aqueous sulfuric acid solutions containing an oxide induced by $$gamma$$-ray irradiation

Yamada, Reiji; Nagaishi, Ryuji; Hatano, Yoshihiko; Yoshida, Zenko

no journal, , 

Hydrogen production under $$gamma$$-ray irradiation in aqueous sulfuric acid solutions that contained oxide fine particles such as alpha-Al$$_{2}$$O$$_{3}$$, TiO$$_{2}$$2, ZrO$$_{2}$$, SiO$$_{2}$$ or SiO$$_{2}$$*nH$$_{2}$$O was investigated using Co-60 $$gamma$$-rays. The dependencies of sulfuric acid concentration, oxide species, and amount of added oxide powder on hydrogen production rate were studied. The experimental results show that the rate was strongly increased with the amount of added oxide powder, and that the rate exhibited each sulfuric acid concentration dependency peculiar to each oxide powder.

Oral presentation

Promoted reduction of metal ions in aqueous solution under irradiation of ionizing radiation by addition of solid oxides

Nagaishi, Ryuji; Yamada, Reiji; Yoshida, Zenko; Hatano, Yoshihiko

no journal, , 

no abstracts in English

Oral presentation

Radiation-induced reduction of metal ions in aqueous solution systems and its application

Nagaishi, Ryuji; Aoyagi, Noboru; Yamada, Reiji; Hatano, Yoshihiko; Yoshida, Zenko

no journal, , 

Promotion of chemical reactions by adding oxide particles to aqueous solution under the irradiation of ionizing radiations has been paid attention especially from the practical viewpoint, so that hydrogen production and decomposition of toxic organic compounds studied. On the other hand, redox of metal ions has not been studied very much since successive reactions after the redox become complicated. In the present study, reduction behavior of metal ions in aqueous solution systems irradiated by $$gamma$$-ray and electron beam was measured, the reduced amount was compared with that by water radiolysis, and then the promotion of reduction by adding oxide particles was found out quantitatively. The application of reduction system to treatment of toxic substances in industry and environment, and to recovery of useful materials from high-level radioactive wastes (HLW), and the utilization of HLW as a radiation resource were also proposed.

Oral presentation

Hydrogen formation in aqueous solutions by $$gamma$$-ray irradiation; Effects of the addition of oxide, sulfuric acid, and alcohol

Yamada, Reiji; Nagaishi, Ryuji; Hatano, Yoshihiko; Yoshida, Zenko

no journal, , 

H$$_{2}$$ gas released to the gas phase in a sample was measured with gas chromatography after H$$_{2}$$ gas was formed in aqueous solution by $$gamma$$-ray irradiation. The experimental results for oxide, sulfuric acid, and alcohol additives in aqueous solution revealed that the H$$_{2}$$ gas increased with increasing the amount of oxide and that the dependence of H$$_{2}$$ gas production on H$$_{2}$$SO$$_{4}$$ concentration was strongly affected by the amount of oxide. The small amount of alcohol addition increased the H$$_{2}$$ production yield, which took a maximum when an aqueous solution contained sulfuric acid and oxide.

24 (Records 1-20 displayed on this page)