Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 255

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Corrosion behavior of pure titanium in high pH solution under $$gamma$$ irradiation

Yukawa, Takuji*; Inoue, Hiroyuki*; Kojima, Takao*; Iwase, Akihiro*; Taniguchi, Naoki; Tachikawa, Hirokazu*

Zairyo To Kankyo 2016 Koenshu (CD-ROM), p.359 - 362, 2016/05

The immersion tests of pure titanium were carried out in aqueous solution containing carbonate/bicarbonate with 50 mM-chloride ion under gamma irradiation. The effect of pH on general corrosion rate of titanium were studied. The experimental results showed that the concentration of hydrogen preoxide was increased with pH, and the corrosion rate increased with the hydrogen preoxide concentration. The corrosion rate in pH12 and 13 were 5 to10 times larger than those under unirradiated conditions.

Journal Articles

Sterilization of harmful insects

Kojima, Takuji

Hosha Kagaku No Jiten, P. 333, 2015/09

no abstracts in English

JAEA Reports

JAEA Takasaki annual report 2013

Kojima, Takuji

JAEA-Review 2014-050, 218 Pages, 2015/03

JAEA-Review-2014-050.pdf:73.11MB

JAEA Takasaki annual report 2013 describes research and development activities performed from April 1, 2013 to March 31, 2014 mainly with Takasaki Ion Accelerators for Advanced Radiation Application (TIARA, four ion accelerators), and electron/$$gamma$$-ray irradiation facilities (an electron accelerator and three $$^{60}$$Co $$gamma$$-ray irradiation facilities) at Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency (JAEA Takasaki). These activities are classified into four research fields: (1) Space, Nuclear and Energy Engineering, (2) Environmental Conservation and Resource Exploitation, (3) Medical and Biotechnological Application, and (4) Advanced Materials, Analysis and Novel Technology. This annual report contains 169 reports consisting of 160 research papers and 9 status reports on operation/maintenance of the irradiation facilities described above.

Journal Articles

Construction of a 300-keV compact ion microbeam system with a three-stage acceleration lens

Ishii, Yasuyuki; Okubo, Takeru; Kojima, Takuji; Kamiya, Tomihiro

Nuclear Instruments and Methods in Physics Research B, 332, p.156 - 159, 2014/08

 Times Cited Count:7 Percentile:47.5(Instruments & Instrumentation)

JAEA Reports

JAEA Takasaki annual report 2012

Kojima, Takuji

JAEA-Review 2013-059, 214 Pages, 2014/03

JAEA-Review-2013-059.pdf:22.27MB

JAEA Takasaki annual report 2012 describes research and development activities performed from April 1, 2012 to March 31, 2013 mainly with Takasaki Ion Accelerators for Advanced Radiation Application (TIARA, four ion accelerators), and electron/$$gamma$$-ray irradiation facilities (an electron accelerator and three $$^{60}$$Co $$gamma$$-ray irradiation facilities) at Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency (JAEA Takasaki). These activities are classified into four research fields: (1) Space, Nuclear and Energy Engineering, (2) Environmental Conservation and Resource Exploitation, (3) Medical and Biotechnological Application, and (4) Advanced Materials, Analysis and Novel Technology. This annual report contains 164 reports consisting of 156 research papers and 8 status reports on operation/maintenance of the irradiation facilities described above, and a list of publications, patents, related press-releases, television broadcasting, and the type of research collaborations as appendices.

Journal Articles

Preparation of polymer gel dosimeters based on less toxic monomers and gellan gum

Hiroki, Akihiro; Sato, Yuichi*; Nagasawa, Naotsugu; Ota, Akio*; Seito, Hajime; Yamabayashi, Hisamichi*; Yamamoto, Takayoshi*; Taguchi, Mitsumasa; Tamada, Masao; Kojima, Takuji

Physics in Medicine & Biology, 58(20), p.7131 - 7141, 2013/10

 Times Cited Count:16 Percentile:38.78(Engineering, Biomedical)

Journal Articles

Present status of radiation source, development of quality-controll and beam technology for conducting coming radiation application

Kojima, Takuji

Hoshasen To Sangyo, (134), p.2 - 3, 2013/06

no abstracts in English

JAEA Reports

JAEA Takasaki annual report 2011

Kojima, Takuji

JAEA-Review 2012-046, 209 Pages, 2013/01

JAEA-Review-2012-046.pdf:16.28MB

JAEA Takasaki annual report 2011 describes research and development activities performed from April 1, 2011 to March 31, 2012 with Takasaki Ion Accelerators for Advanced Radiation Application (TIARA, four ion accelerators), and electron/$$gamma$$-ray irradiation facilities (an electro accelerator and three $$^{60}$$Co $$gamma$$-ray irradiation facilities) at Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency (JAEA Takasaki). These activities are classified into four research fields: (1) Space, Nuclear and Energy Engineering, (2) Environmental Conservation and resource Exploitation, (3) Medical and Biotechnological Application, and (4) Advanced Materials, Analysis and Novel Technology. This annual report contains 158 reports consisting of 150 research papers and 8 status reports on operation/maintenance of the irradiation facilities described above.

Journal Articles

Effect of temperature on the response of alanine dosimeters under low dose and long time irradiation

Seito, Hajime; Nagao, Yuto; Momoki, Yohei*; Kaneko, Hirohisa; Nakagawa, Kazumichi*; Kojima, Takuji

JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 153, 2013/01

no abstracts in English

Journal Articles

The Effect of temperature on the response of alanine dosimeters under low dose and long time irradiation

Nagao, Yuto; Seito, Hajime; Momoki, Yohei*; Kaneko, Hirohisa; Nakagawa, Kazumichi*; Kojima, Takuji

Radioisotopes, 61(4), p.173 - 177, 2012/04

Applications of alanine dosimeter are widen to dosimetry in space environment and so on. The effect of temperature during and after irradiation between 20$$^{circ}$$C and 80$$^{circ}$$C on the dose response of alanine dosimeters was investigated under low dose of about 10 - 20 Gy and long time of about 100 hours irradiations. When a stable component of the dose response under high irradiation temperature is estimated on the basis of the effect of storage temperature after irradiation taking into account the known irradiation temperature coefficient, dose evaluation using alanine dosimeter should be more accurate even suffering from combined temperature effects during and after irradiation.

JAEA Reports

JAEA Takasaki annual report 2010

Kojima, Takuji

JAEA-Review 2011-043, 207 Pages, 2012/01

JAEA-Review-2011-043.pdf:12.74MB

JAEA Takasaki annual report 2010 describes research and development activities performed from April 1, 2010 to March 31, 2011 with Takasaki Ion Accelerators for Advanced Radiation Application (TIARA), and electron/$$gamma$$-ray irradiation facilities at Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency (JAEA Takasaki). These activities are classified into four research fields: (1) Space, Nuclear and Energy Engineering, (2) Environmental Conservation and Resource Exploitation, (3) Medical and Biotechnological Application, and (4) Advanced Materials, Analysis and Novel Technology. This annual report contains 159 reports consisting of 151 research papers and 8 status reports on operation/maintenance of the irradiation facilities described above, and a list of publications, patents, related press-releases, TV broadcasting, and the type of research collaborations as Appendices.

Journal Articles

Spectroellipsometric studies on EB induced refractive index change of aliphatic polyimide

Seito, Hajime; Hakoda, Teruyuki; Hanaya, Hiroaki; Haruyama, Yasuyuki; Kaneko, Hirohisa; Yamashita, Takashi*; Kojima, Takuji

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 150, 2012/01

no abstracts in English

Journal Articles

Dosimetry for 110 keV electron beam processing

Seito, Hajime; Matsui, Shinjiro*; Hakoda, Teruyuki; Ishikawa, Masayoshi*; Haruyama, Yasuyuki; Kaneko, Hirohisa; Kimura, Jun*; Kojima, Takuji

Zairyo Gijutsu, 30(1), p.10 - 16, 2012/01

The dosimetry of a 110 keV electron beam (EB) irradiation field is studied using a calorimeter, film dosimeter, and Monte Carlo simulation. This is important base for dose control in practical processing to guarantee the process reproducibility and product reliability. The simulation results are validated on the measurement of the energy fluence obtained by the calorimeter at one position in the air plane at different distances from a beam exit window. The spatial dose distribution obtained from the simulation is compared to that obtained by the film dosimeter. They show good agreement within $$pm$$5.0%. The precision of $$pm$$5.0% is sufficient to control the surface modification of polymers and the development of semiconductor devices in practical radiation processing. These results suggest that film dosimetry results at just one position in the air plane are sufficient to determine the irradiation characteristics of the low energy EB, and to provide a base of quality control measures in practical radiation processing.

Journal Articles

Design of a compact focusing lens system with short acceleration tube at 300 kV

Ishii, Yasuyuki; Okubo, Takeru; Kojima, Takuji; Kamiya, Tomihiro

Nuclear Instruments and Methods in Physics Research B, 269(20), p.2193 - 2196, 2011/11

 Times Cited Count:9 Percentile:40.63(Instruments & Instrumentation)

Journal Articles

Purification of gas using electron beam

Hirota, Koichi; Hakoda, Teruyuki; Shimada, Akihiko; Taguchi, Mitsumasa; Kimura, Atsushi; Kojima, Takuji

Proceedings of 12th International Conference on Radiation Curing in Asia (RadTech Asia 2011) (Internet), p.108 - 109, 2011/06

We have focused on using MnO$$_2$$ for the oxidation of intermediates produced from electron beam irradiation of VOC. Manganese dioxide can decompose ozone, produced by the irradiation of air containing VOCs, into activated oxygen, which can ultimately oxide the intermediates. Hybrid system equipped with electron accelerator and MnO$$_2$$ has demonstrated the complete oxidation of the intermediates produced during the irradiation of xylene and toluene. The electron-beam treatment of dioxin from municipal solid waste incinerator was carried out at Takahama Clean Center in Japan. An incinerator gas of 1000 m$$^3$$N/h was diverted downstream of a dry electric precipitator and was irradiated with electron beams using an electron accelerator that supplied 300 kV with a maximum energy of 12 kW. The results showed electron-beam is a promising technology for destroying dioxin in exhaust gases.

Journal Articles

Dosimetry systems and absorbed dose measurement

Kojima, Takuji

Herusukea Seihin No Mekkin Oyobi Mekkin Hosho, p.122 - 125, 2011/04

no abstracts in English

Journal Articles

Operation and utilization of irradiation facilities at TARRI

Kojima, Takuji

Hoshasen To Sangyo, (128), p.23 - 28, 2010/12

no abstracts in English

Journal Articles

Characteristics of $$gamma$$-ray response of Radix W dosimeter in several kGy range

Ichikawa, Tatsuya*; Seito, Hajime; Sato, Yoshishige*; Takehisa, Masaaki*; Kojima, Takuji; Watanabe, Hiroshi*

Shokuhin Shosha, 45(1-2), p.1 - 3, 2010/09

Journal Articles

Simulation technique on dose-rate distribution in a $$^{60}$$Co $$gamma$$-ray irradiation field

Kaneko, Hirohisa; Haruyama, Yasuyuki; Seito, Hajime; Yamagata, Ryohei; Hanaya, Hiroaki; Kojima, Takuji

Radioisotopes, 59(1), p.11 - 19, 2010/01

Dose-rate distribution in irradiation area of cobalt-60 $$gamma$$ rays was calculated using a Monte Carlo photon transport code named as EGS-SPG code. The dose rate values measured by the ionization chamber and the alanine dosimeter were compared with calculated ones for the evaluation of the validity of the calculation. As a result, the difference between measurements and the calculation value was within $$pm$$ a few % except for a position very near the source for a wide board radiation source. The dose-rate distribution can be estimated using these numerical results at the beforehand planning of a board radiation source arrangement although dose-rate measurement should be done only for a position very near the radiation source, where calculated value disagreed. The dose rate distribution measurement after the radiation source arrangement enables us to save number of the dosimeter and measurement time.

Journal Articles

Immune response pathways in human keratinocyte (HaCaT) cells are induced by ultraviolet B via p38 mitogen-activated protein kinase activation

Muto, Yasuko; Tsukimoto, Mitsutoshi*; Homma, Takujiro*; Kojima, Shuji*

Journal of Health Science, 56(6), p.675 - 683, 2010/00

 Times Cited Count:3 Percentile:89.39(Toxicology)

255 (Records 1-20 displayed on this page)