Faculty Profiles - HANAMOTO Katsumi

Papers - HANAMOTO Katsumi

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三朝ラドン温泉適応症の機構に関する検討ラドン高濃度熱気浴反復治療による気管支喘息の改善の機構

光延文裕, 山岡聖典, 御舩尚志, 小島周二, 花元克巳, 杉田勝彦, 谷崎勝朗

日本放射線影響学会大会講演要旨集 45回 113 - 113 2002.9

吸入ラドンの体内動態に関する検討実験方法の確立に向けての試み

花元克巳, 光延文裕, 澁谷光一, 永松知洋, 汪達紘, 吉良尚平, 山岡聖典

日本放射線影響学会大会講演要旨集 45回 112 - 112 2002.9

三朝ラドン温泉適応症の機構に関する検討ラドン高濃度熱気浴反復治療による変形性関節症の改善の機構

山岡聖典, 光延文裕, 御舩尚志, 小島周二, 渋谷光一, 花元克巳, 谷崎勝朗, 杉田勝彦

日本放射線影響学会大会講演要旨集 45回 112 - 112 2002.9

Irradiation effect of synchrotron radiation on crystallization of thin amorphous WO3 film

Y Kimura, K Hanamoto, Y Nakayama, C Kaito

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 194 ( 2 ) 187 - 192 2002.8

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

In order to elucidate the effect of synchrotron radiation (SR) irradiation on crystal growth, crystallization of WO3 films has been performed in vacuum under SR irradiation. The main results were compared with the results of heat treatment of the same film. Upon SR irradiation for 80 s using a toroidal mirror, a catastrophic change occurred, i.e. W3O crystals (A-15 type) with a size of less than 30 nm appeared. Decomposition of the WO3 film started at above 750 degreesC during vacuum heating. W, WO2 and incommensurate WO3 crystals appeared. W3O crystal produced neither intense electron beam irradiation nor vacuum heating. These results will be discussed in terms of the differences caused by excitation with a SR beam, i.e. strong inner shell excitation and ionization of W and O may have taken place.
(C) 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(02)00685-7

Effects of SR irradiation on tin-doped indium oxide thin film prepared by rf magnetron sputtering

M Sasaki, K Hanamoto, Y Kimura, C Kaito, H Miki, Y Nakayama

REVIEW OF SCIENTIFIC INSTRUMENTS 73 ( 3 ) 1384 - 1386 2002.3

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER INST PHYSICS

The effects of synchrotron radiation (SR) irradiation on the electrical properties of tin-doped In2O3 (ITO) thin films prepared by rf magnetron sputtering have been studied. A white SR beam focused by a cylindrical mirror was used to irradiate ITO thin films at doses of 0.35, 1.98, 3.50, and 6.64 mA h. We have achieved resistivity of 2x10(-4) Omega cm on ITO thin film at an irradiation dose of 3.5 mA h without extra heating. The mobility of the ITO films did not decrease after SR irradiation. The electrical properties in connection with the structural change due to SR are discussed. (C) 2002 American Institute of Physics.

DOI： 10.1063/1.1423624

Elevation of antioxidant potency in mice brain by low-dose X-ray irradiation and its effect on Fe-NTA-induced brain damage

Kiyonori Yamaoka, Shuji Mori, Takaharu Nomura, Takehito Taguchi, Takehiko Ito, Katsumi Hanamoto, Shuji Kojima

Physiological Chemistry and Physics and Medical NMR 34 ( 2 ) 119 - 132 2002

Language：English Publishing type：Research paper (scientific journal)

The increase in lipid peroxide levels in mice brain following Fe 3+ administration was about 50% of that when 1-methyl-4-phenyl 1,2,3,6-tetrahydropyridine (MPTP) was administered. This may be due to excessive oxidation by Fe3+, and was supported by the decrease in activities of antioxidant enzymes, such as superoxide dismutase (SOD), catalase and glutathione peroxidase (GPX), Na+,K+-ATPase activity and membrane fluidity after Fe3+ administration. Relatively low-dose X-ray irradiation (0.5 Gy) inhibited lipid peroxidation associated with Fe 3+ administration and restored the decreased activities of the above antioxidant enzymes and Na+K+-ATPase, and membrane fluidity to the levels in the non-Fe3+-administered group. In the purine metabolism system, uric acid decreased after Fe3+ administration, which may be due to transient impairment of the system for production of uric acid from xanthine by excessive oxidation by Fe3+. However, 0.5 Gy irradiation inhibited this decrease in uric acid, increasing its level to that in the non Fe3+-administrated group. This may be due to factors such as rapid recovery of the activities of the above antioxidant enzymes and Na+,K+-ATPase, and membrane fluidity after 0.5 Gy irradiation. In addition, since no changes were observed in xanthine and uric acid, increased inosine and hypoxanthine may have advanced to a salvage pathway leading to not xanthine but inosine 5′-monophosphate (IMP).

Growth process of carbyne crystals by synchrotron irradiation

Y Kimura, C Kaito, K Hanamoto, M Sasaki, S Kimura, T Nakada, Y Saito, Y Nakayama

CARBON 40 ( 7 ) 1043 - 1050 2002

Language：English Publishing type：Research paper (scientific journal) Publisher：PERGAMON-ELSEVIER SCIENCE LTD

Growth of small carbyne crystals in a thin amorphous carbon film has been observed by high-resolution transmission electron microscopy (HRTEM). The as-deposited film was composed of diamond and graphite crystallites of size 1 nm. Circular alpha-phase carbyne crystals predominantly grew to 20 nm in size and transformed into (alpha+beta)-phase crystals with an elongated shape of 100 nm in length. The typical correlation during the transformation is (220)(alpha)//(301)((alpha+beta)) The c-axes of both grown crystals were oblique to the direction of the electron beam. The growth process of carbyne crystals will be discussed in terms of selective excitation of graphite crystallites by an SR beam. (C) 2002 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0008-6223(01)00242-1

Simple and Easy Method for Measurement of Airborne Radioactive Iodine(125I).

SHIBUYA Koichi, YAMAOKA Kiyonori, NAGAMATSU Tomohiro, HANAMOTO Katsumi, KAWASAKI Shoji, HIRAKI Yoshio

RADIOISOTOPES 51 ( 2 ) 66 - 70 2002

Language：Japanese Publisher：Japan Radioisotope Association

Radioactive iodine isotopes are necessary to be handled carefully, because they scatter easily. As air concentration limits of the radioisotopes are very low levels, we should prepare the measurement technique using a large-volume aspirator and largescale equipments for environment measurement in radiation controlled areas. In the present study, we designed and manufactured a simple set of holder and charcoal filter connected to a foot pump, and we examined the validity of the system. The collecting efficiency of airborne iodine-125 by this system was 0.379±0.107. However, in the case that 10 L air were filtered by this system and counted for 10 min by a NaI (Tl) well-type scintillation counter, it was shown that iodine-125 at air concentration limit could be measured.

DOI： 10.3769/radioisotopes.51.66

Adjustment function among antioxidant substances in acatalasemic mouse brain and its enhancement by low-dose x-ray irradiation

Kiyonori Yamaoka, Takaharu Nomura, Da-Hong Wang, Shuji Mori, Takehito Taguchi, Tetsuya Ishikawa, Katsumi Hanamoto, Shohei Kira

Physiological Chemistry and Physics and Medical NMR 34 ( 2 ) 133 - 144 2002

Language：English Publishing type：Research paper (scientific journal)

The catalase activities in blood and organs of the acatalasemic (C3H/AnLCsbCsb) mouse of the C3H strain are lower than those of the normal (C3H/AnLCsaCsa) mouse. We conducted a study to examine changes in the activities of antioxidant enzymes, such as catalase, superoxide dismutase (SOD) and glutathione peroxidase (GPX), the total glutathione content, and the lipid peroxide level in the brain, which is more sensitive to oxidative stress than other organs, at 3, 6, or 24 hr following X-ray irradiation at doses of 0.25, 0.5, or 5.0 Gy to the acatalasemic and the normal mice. No significant change in the lipid peroxide level in the acatalasemic mouse brain was seen under non-irradiation conditions. However, the acatalasemic mouse brain was more damaged than the normal mouse brain by excessive oxygen stress, such as a high-dose (5.0 Gy) X-ray. On the other hand, we found that, unlike 5.0 Gy X-ray, a relatively low-dose (0.5 Gy) irradiation specifically increased the activities of both catalase and GPX in the acatalasemic mouse brain making the activities closer to those in the normal mouse brain. These findings may indicate that the free radical reaction induced by the lack of catalase is more properly neutralized by low dose irradiation.

Effects of carbon implantation on the electrical properties of amorphous In2O3 thin film

K Hanamoto, M Sasaki, H Miki, Y Nakayama

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 184 ( 3 ) 371 - 377 2001.11

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Carbon ions with an energy of 30 keV have been implanted into amorphous In2O3 thin films at doses of 1 x 10(15) -2 x 10(16) cm(-2). After implantation the films were annealed in air and subsequently in a vacuum at 350 degreesC for 1 h. The electrical resistivities of carbon-implanted films decreased due to the increase in the carrier concentration. However, the whole properties were not much improved compared to a previous experiment by the use of crystalline In2O3 film as a starting material. The relation between the crystal structure and the electrical property will be discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(01)00788-1

Effect of SR irradiation on In2O3 film

K Hanamoto, A Hirai, M Sasaki, Y Kimura, K Miyatani, C Kaito, Y Nakayama

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 467 1213 - 1216 2001.7

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The effect of SR irradiation on the crystal growth of indium oxide films prepared by electron-beam evaporation have been studied by X-ray diffraction and high-resolution electron microscopy. An as-deposited film showed In2O3 crystallites with a size of 2-10 nm. The crystallites were destroyed by SR irradiation under oxygen flow, SR irradiation without oxygen flow showed the growth of In2O3 crystallites up to 20 nm in size with accompanying deoxidation and indium-particle growth. The as-deposited film was composed of variously oriented particles. Periodic oxygen decomposition of the film preferentially took place on the (0 0 1)-oriented particle. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-9002(01)00618-0

Effect of SR irradiation on crystallization of amorphous tin oxide film

Y Kimura, T Kobayashi, K Hanamoto, M Sasaki, S Kimura, T Nakada, Y Nakayama, C Kaito

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 467 1221 - 1224 2001.7

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

In order to see the effect of SR irradiation on crystal growth., crystallization of tin oxide films has been performed in vacuum under SR irradiation, A thin amorphous tin oxide film 50 nm thick was prepared on the carbon substrate by vacuum evaporation of SnO2 power, A SnO crystal appeared between 450-500 degreesC upon vacuum heating, with a preferred orientation of (0 0 1). By SR irradiation using a cylindrical mirror for 20 s, the SnO crystal appeared with the preferred orientation of (1 1 1). The crystal with the crystallographic shear structure was grown by SR irradiation. This growth under a SR beam is discussed in terms of SR beam excitation of lone-pair electrons seen in the SnO crystal structure. (C). 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-9002(01)00624-6

Carbyne formation by synchrotron radiation

C Kaito, Y Kimura, K Hanamoto, M Sasaki, S Kimura, T Nakada, Y Saito, C Koike, Y Nakayama

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 467 1217 - 1220 2001.7

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Thin carbon films prepared by vacuum evaporation using the arc method were mounted on a standard electron microscope copper grid. They were irradiated by white synchrotron radiation (SR) beam by the use of cylindrical and toroidal mirrors. The irradiated film was examined using a high-resolution electron microscope alpha and alpha + beta mixture carbyne crystals were grown in round and the elongated shapes. The round crystals were composed of 5-10 nm crystallites of a carbyne form. The elongated crystal grew into a single crystal 100 nm in size. The c-axes of both grown crystals were oblique to the film. The growth of the carbynes was discussed as being the result of nucleation due to graphite microcrystallites formed by SR beam irradiation. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-9002(01)00575-7

Electrical and optical properties of boron and nitrogen implanted In2O3 thin films

K Hanamoto, M Sasaki, K Miyatani, C Kaito, H Miki, Y Nakayama

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 173 ( 3 ) 287 - 291 2001.1

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Electrical and optical properties of In2O3 thin films doped with boron and nitrogen have been studied. Boron and nitrogen ions were implanted into In2O3 thin films with an energy of 25 and 35 keV, respectively, at doses of 1 x 10(15)-1.6 x 10(16) cm(-2). After implantation the films were annealed for 1 h in air and subsequently for 1 h in a vacuum. After the two-step annealing at 350 degreesC, the electrical resistivity of the boron implanted sample with a dose of 4 x 10(15) cm(-2) achieved 4.4 x 10(-4) Omega cm with an averaged optical transmittance of 84% at a wavelength between 380 and 780 nm. On the other hand, for nitrogen implanted samples, the resistivity did not improve by ion implantation but the optical transmittance was unchanged. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(00)00334-7

Electrical and optical properties of carbon implanted In2O3 thin film

K Hanamoto, M Sasaki, T Yoneda, K Miyatani, H Miki, C Kaito, Y Nakayama

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 168 ( 3 ) 389 - 394 2000.7

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Electrical and optical properties of In2O3 thin film with carbon ion implantation have been studied. The location of the implanted carbon in the film was also investigated by means of a high-resolution electron microscope. Carbon ions were implanted into In2O3 thin films with an energy of 30 keV at doses of 1 x 10(15) to 2 x 10(16) cm(-2). After implantation the films were annealed for 1 h in air and subsequently for 1 h in a vacuum. After the two step annealing at 350 degrees C, the electrical resistivity achieved for a sample with an ion dose of 5 x 10(15) cm(-2) was 5.4 x 10(-4) Ohm cm with an optical transmittance of 82% at a wavelength of 550 nm. (C) 2000 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(99)01201-X

Low-resistivity highly transparent indium-tin-oxide thin films prepared at room temperature by synchrotron radiation ablation

Y Akagi, K Hanamoto, H Suzuki, T Katoh, M Sasaki, S Imai, M Tsudagawa, Y Nakayama, H Miki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 38 ( 12A ) 6846 - 6850 1999.12

Language：English Publishing type：Research paper (scientific journal) Publisher：JAPAN J APPLIED PHYSICS

High-transparency, low-electrical-resistivity indium-tin-oxide (ITO) thin films were prepared on quartz substrates using synchrotron radiation ablation at room temperature. The films had a low resistivity (rho = 1.3 x 10(-4) Omega-cm) and high-transparency properties in the visible region (T = 83% at 550nm). X-ray diffraction patterns indicate that the crystalline ITO film was obtained by room-temperature deposition.

DOI： 10.1143/JJAP.38.6846

The combined application of PIXE analysis and thermoluminescence (TL) dating for elucidating the origin of iron manufacturing in Japan

N Hagihara, S Miono, Z Chengzhi, Y Nakayama, K Hanamoto, S Manabe

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 150 ( 1-4 ) 635 - 639 1999.4

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

For elucidating the origin of iron manufacturing in Japan, the usefulness of PIXE analysis was reconfirmed and a new technique of thermoluminescence (TL) dating was applied. Through reproducing experiments of iron manufacturing and forging, PIXE analysis was tested for classifying the iron slag produced from these two different process. The TL dating method was improved for experiments with the iron manufacturing furnace, burnt at high temperature (about 1300 K) and irradiated with relatively low dose. Utilizing PIXE analysis, the iron manufacturing furnace can be distinguished from the older forging furnace used for the imported iron plate. Adopting TL dating, the oldest iron manufacturing furnace can be found out. Some ancient samples in Japan were used as a test of this combined application, and the results were positive, thus proving the suitability of the method. (C) 1999 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(98)01077-5

The discovery of native iron nuggets in the 250 my old bedded chert of Sasayama section, Japan: provenance estimated by PIXE analysis

S Miono, Y Nakayama, K Hanamoto

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 150 ( 1-4 ) 516 - 519 1999.4

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

A large number of micron sized native iron nuggets (micro iron nugget) occurs in the Triassic-Permian bedded chert. Judging from PIXE analyses and microscopic observations, an interstellar origin is deduced. The occurrence of micro iron nuggets is remarkable and is strongly suggestive of the existence of a neu accretional mechanism in space. (C) 1999 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(98)00917-3

Study on thin SiC layer split by hydrogen implantation in SiC

T Hosono, K Hanamoto, T Ueno, Kitabatake, I, M Sasaki, Y Nakayama, S Nishino

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 149 ( 1-2 ) 67 - 71 1999.1

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

A thin SiC layer split by H-2 implantation with an energy of 160 keV in SiC wafer has been studied by a new method of optical reflectance interference spectrometry (ORIS). The ORIS spectra revealed that thin SiC layer caused by microsplits is formed over almost whole region of the samples and the thickness of the thin SiC layer is about 630 nm for this implantation. The thickness split has been discussed in connection with the results of atomic force microscopy (AFM) and Rutherford backscattering spectrometry/channeling (RBS/C) The RBS/C measurements also indicated that the surface lattice defects of SiC due to H-implantation decreased by beat treatments. (C) 1999 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(98)00623-5

Annealing effects on the hardening of electroless plated Ni-P layer by boron implantation

K Hanamoto, M Sasaki, T Miyashita, Y Kido, Y Nakayama, Y Kawamoto, M Fujiwara, R Kaigawa

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 145 ( 3 ) 391 - 394 1998.11

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Annealing effects of hardening of electroless plated Ni-P layer on an iron based alloy have been studied in connection with 200 keV boron ion implantation at a dose of 1 x 10(17) ions/cm(2). Increases of Vickers hardness in the near-urface region were observed to an extent of 17% for the pre-annealed specimens compared to unimplanted ones. Post-nnealed specimens did not show effective hardening by the implantation treatment. The chemical states of implanted ions were studied by X-ray photoelectron spectroscopy (XPS) and the results may suggest that the increase of hardness is not due to the precipitation of nickel borides, but rather due to amorphization of Ni and Ni3P. (C) 1998 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0168-583X(98)00419-4

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