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Tsuda, Shuichi; Sato, Tatsuhiko; Ogawa, Tatsuhiko
JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 141, 2016/09
Deposit energy distribution in microscopic site in a living cell is important information for understanding of biological effects of energetic heavy ion beams. In this work, a wall-less tissue equivalent proportional counter has been used for the measurement of lineal energy (
) distributions and dose-mean of (
) at radial direction of 30 MeV H at TIARA, for the verification of the microdosimetric function of PHITS. The measured 
() summed in radial direction agree with the corresponding data from the microdosimetric calculations using the PHITS code fairly well. The of 30 MeV proton beam presents the smallest value at 
= 0.0 and gradually increase with radial distance, while the values of heavy ions such as iron showed rapid decrease with radial distance. This experimental result demonstrates that the stochastic deposit energy distribution of high-energy protons in microscopic region is rather constant both in the core and in the penumbra region of the track structure.
Br-bromo-
-methyl-L-phenylalanine as a novel Br-labeled PET tracerOhshima, Yasuhiro; Hanaoka, Hirofumi*; Suzuki, Yurika*; Yamaguchi, Aiko*; Watanabe, Shigeki; Uehara, Tomoya*; Nagamori, Shushi*; Kanai, Yoshikatsu*; Ishioka, Noriko; Tsushima, Yoshito*; et al.
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Ogawa, Tatsuhiko; Yamaki, Tetsuya; Sato, Tatsuhiko
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irradiationTakeuchi, Tomoaki; Otsuka, Noriaki; Shibata, Hiroshi; Uehara, Toshiaki; Tsuchiya, Kunihiko
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Suzui, Nobuo; Maruyama, Teppei*; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*; Fujimaki, Shu
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Sato, Junya; Suzuki, Shinji; Nakagawa, Akinori; Kato, Jun; Sakakibara, Tetsuro; Meguro, Yoshihiro; Nakazawa, Osamu
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irradiation for inorganic solidified samples containing simulated ALPS wastesSato, Junya; Suzuki, Shinji; Nakagawa, Akinori; Kato, Jun; Sakakibara, Tetsuro; Meguro, Yoshihiro; Nakazawa, Osamu
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-ray irradiation facilitiesAgematsu, Takashi; Uno, Sadanori; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Nagao, Yuto; Yamasaki, Shota; Kawashima, Ikuo*; Yagi, Norihiko*; Takagi, Masahide*; et al.
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The -ray irradiation facility have been operated smoothly in FY2014, on the other hand, the rate of operation was down to 60% compared to FY2013 for troubles at the electron accelerator. The annual operation time in FY 2014 for the electron accelerator, the first, the second cobalt irradiation facility and food irradiation facility are 746h, 19,907h, 13,831h and 7,293h, respectively. Typical maintenance is as follows. The isolation pillar of high-voltage circuit, leakage of isolation gas were repaired, SF
isolation gas was purified at the electron accelerator. The periodic maintenance was done for the second irradiation facility. New pieces of 
Co sources were purchased and loaded to the food irradiation facility.
Tanno, Takashi; Oka, Hiroshi; Otsuka, Satoshi; Yano, Yasuhide; Kaito, Takeji
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Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Hase, Yoshihiro; Fujimaki, Shu
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Inoue, Toshihiko; Yamashita, Shinichiro; Yamagata, Ichiro; Kaito, Takeji; Ioka, Ikuo
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Precipitation-strengthened high-nickel alloys have been developed for fast reactor fuel cladding material because of their intrinsic good dimensional stability. Nimonic PE16 is known as the representative high-nickel alloy, and it is a material strengthened by an intermetallic compound such as ordered phase -prim (Ni
(Ti, Al)) formed in the matrix. The most important issue in development of high-nickel alloy is considered to be the improvement of mechanical properties at elevated temperature: the significant ductility is lost due to irradiation at high temperature. The cause of this problem was believed to be the re-distribution of ordered phase -prime and solute segregation to defect sink sites, such as grain boundary, dislocation and void surface, during irradiation. In this study, several types of precipitation-strengthened high-nickel alloys were developed and then the phase stability (precipitate stability and swelling resistance) in these alloys during irradiation was evaluated by using TIARA facility. The void swelling of 15Cr-35Ni-28, which is the high-nickel alloy with a same chemical composition of 15Cr-35Ni and 10% cold working, is lower than that of 15Cr-35Ni. It is considered that the effect of cold working improves its void swelling resistance and that dislocations induced by cold working would be effective sink sites for point defects.
Hirota, Koichi
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Takasaki Advanced Radiation Research Institute has the ion beam irradiation facility equipped with cyclotron, tandem and single-ended accelerators, and ion implanter, the electron beam irradiation facility, and the cobalt 60 -ray irradiation facility. These facilities are opened widely to universities, public laboratories and industries to promote the radiation application in the fields of material development, environmental conservation and biotechnology. To use these facilities, there are three programs of the MEXT (Ministry of Education, Culture, Sports, Science and Technology in Japan) grants, share and common use, and in-house collaboration research. In the presentation, objective and outline of the three programs, particularly technical support on the MEXT grants, are introduced.
Maekawa, Masaki; Kawasuso, Atsuo
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Kurita, Keisuke; Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
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Ishii, Satomi; Yamazaki, Haruaki*; Suzui, Nobuo; Yin, Y.-G.; Kawachi, Naoki; Shimada, Hiroaki*; Fujimaki, Shu
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Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Yoshihara, Toshihiro*; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu
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Nakahara, Risa; Hanaya, Hiroaki; Hirota, Koichi; Negishi, Mitsuharu; Haruyama, Yasuyuki; Takizawa, Haruki; Shidomi, Kenji
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The facilities of JAEA are widely opened to many outside researchers in universities, public institutes, industries, and so on. FACILITY USE PROGRAM started in 2006, which is the system for users' service on fee-charging basis in the use of facilities. The facilities used in Takasaki at the system are Co-60 Gamma-ray Irradiation Facilities, Electron Accelerator, TIARA's accelerators, and some of the off-line analysis instruments.
Hanaya, Hiroaki; Hirota, Koichi; Takizawa, Haruki; Haruyama, Yasuyuki; Kaneko, Hirohisa*; Nakamura, Yoshiteru*; Kaneya, Satoshi*; Asai, Takahiro*; Saga, Keisuke*; Kawabata, Michiko*
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by ion beam breeding technologySato, Katsuya; Ueda, Ryoshiro*; Hase, Yoshihiro; Ono, Yutaka; Narumi, Issey*
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Ueda, Ryoshiro*; Sato, Katsuya; Ono, Yutaka; Hayashi, Hidenori*; Narumi, Issey*
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