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Kurashima, Satoshi
Dai-7-Kai Takasaki Oyo Kenkyu Shimpojiumu Yoshishu, p.35 - 36, 2012/10
no abstracts in English
Uno, Sadanori; Chiba, Atsuya; Yamada, Keisuke; Yokoyama, Akihito; Saito, Yuichi; Ishii, Yasuyuki; Sato, Takahiro; Okubo, Takeru; Nara, Takayuki; Kitano, Toshihiko*; et al.
Dai-7-Kai Takasaki Oyo Kenkyu Shimpojiumu Yoshishu, P. 119, 2012/10
The three electrostatic accelerators at TIARA had no damage when the Tohoku earthquake happened on March 11, 2011. But, they could not be operated until end of April, due to the influence of planned power outage and keep out into the controlled area for radiation. These accelerators additionally operated on Saturday for twelve days in order to compensate for the lost experiment time. Therefore, the yearly operation time had kept the same level as the ordinary one. The tandem accelerator has stopped leakage of the SF
gas from the base flange on the tank by the Viton gasket of rectangular cross section at the new type.
-ray pre-irradiation grafting; Effect of the structure of quaternary ammonium ionsKoshikawa, Hiroshi; Yamaki, Tetsuya; Asano, Masaharu; Yoshimura, Kimio; Maekawa, Yasunari; Yamamoto, Kazuya*; Shishitani, Hideyuki*; Asazawa, Koichiro*; Yamaguchi, Susumu*; Tanaka, Hirohisa*
no journal, ,
We investigated the effect of the length of the linear chain on the structure of quaternary ammonium ions on the membrane properties such as durability of ion conductivity. Graft polymerization was performed by immersing the pre-irradiated ETFE film in the CMS solution. The ETFE-g-CMS film was then quaternized in four different tertiary amines, that is, trimethylamine (n = 1), dimethylethylamine (n = 2), n-butyldimethylamine (n = 4) and n-hexyldimethylamine (n = 6) solutions. The n dependence of the OH
conductivity and chemical durability, which was represented by a residual percentage of the conductivity after treatment with a Fenton solution. When n increased from 1 to 6, the OH conductivity decreased slightly, but it still stayed 20 mS/cm for n = 6. The chemical durability seemed to increase eight-fold at the same time. The chemical attack by hydroxyl radicals on the quaternary ammonium ions would be controlled by hydrophobicity and steric hindrance of the alkyl group.
Kitamura, Akane; Sato, Takahiro; Koka, Masashi; Kamiya, Tomihiro; Kobayashi, Tomohiro*
no journal, ,
no abstracts in English
Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Yamaguchi, Mitsutaka; Tanoi, Keitaro*; Nakanishi, Tomoko*; Chino, Mitsuo*; Nakamura, Shinichi*; Watabe, Hiroshi*; Yamamoto, Seiichi*; et al.
no journal, ,
no abstracts in English
Ishizaka, Tomohisa; Imai, Koji; Yuri, Yosuke; Yuyama, Takahiro; Ishibori, Ikuo; Okumura, Susumu; Yoshida, Kenichi; Kurashima, Satoshi; Miyawaki, Nobumasa; Kashiwagi, Hirotsugu; et al.
no journal, ,
no abstracts in English
Kada, Wataru; Sato, Takahiro; Yokoyama, Akihito; Koka, Masashi; Kamiya, Tomihiro
no journal, ,
no abstracts in English
Miura, Kenta*; Kikuchi, Shusuke*; Kiryu, Hiromu*; Inada, Kazuki*; Ozawa, Yusuke*; Hanaizumi, Osamu*; Yamamoto, Shunya; Sugimoto, Masaki; Yoshikawa, Masahito; Kawaguchi, Kazuhiro; et al.
no journal, ,
no abstracts in English
Shigyo, Nobuhiro*; Nishizawa, Tomoya*; Ishibashi, Kenji*; Iwamoto, Yosuke; Matsuda, Norihiro; Sakamoto, Yukio*; Hagiwara, Masayuki*
no journal, ,
In this study, we measured TTNY of 10 MeV deuteron incidence on a thick tungsten target. The thickness of a tungsten target was 0.15 mm, in which a 10 MeV deuteron completely stopped. The target was put in a vacuum chamber in order to avoid energy loss of deuteron in the air. A 20 mm thick aluminum flange was set downstream of the target at 0
as a beam stopper for other thin target experiments. Two NE213 scintillators with 5.08 cm thickness and 5.08 cm diameter were adopted as neutron detectors. Measurement directions were 0, 15, 30 and 60. Flight paths between the target and detectors were from 2.0 to 5.0 m depending on available area in the room. Calculation results by PHITS with QMD model and TALYS with An-Cai deuteron optical potential are also given. Both calculations reproduce trend of experimental data, however, overestimate at 15, 30 and 60.
Ne beamIwamoto, Yosuke; Matsuda, Norihiro; Sakamoto, Yukio*; Hagiwara, Masayuki*; Sanami, Toshiya*; Shigyo, Nobuhiro*; Nishizawa, Tomoya*
no journal, ,
We describe the measurements of neutron and charged particle production double differential cross sections (DDXs) from 15-
m-thick 
Be and 1-m-thick 
Fe targets bombarded with 13 MeV/nucleon Ne and comparisons between the experimental data and calculation results. The target was installed in a vacuum chamber. For the neutron measurement, the NE213 organic liquid scintillators were placed at a distance of 2.0 m from the target. For charged particle measurements, the telescope detectors composed of three Si strip detectors (SSDs) with different thickness were placed in a vacuum chamber. For neutrons, the calculated results generally overestimated the measured data due to the emission of many neutrons following the decay of excited fragments with high energies. For tritons, calculated results at 30 give good agreement with the experimental data, while that at 90 gives large underestimation.
-ray irradiationNakayama, Takuya; Kawato, Yoshimi; Meguro, Yoshihiro
no journal, ,
Radioactive combustible wastes generated in JAEA are incinerated and the incinerated ash obtained will be solidified with cement. Hydrogen gas may be generated from the cement solidified form by radiolysis. Therefore, we tried to determine G-value for hydrogen gas generation from the cement solidified form. The G-value is needed to evaluate safety of storage of the cement solidified form. An artificial cement solidified form of incinerated ash was irradiated with 2.7 kGy -ray from a 
Co source for 1 hour. G-value calculated using the absorbed dose, the weight of the form and the amount of hydrogen generated was 1.22 
0.18 molecule/100 eV.
-ray irradiation facilitiesAgematsu, Takashi; Haruyama, Yasuyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Nagao, Yuto; Kaneko, Hirohisa; Yamaguchi, Toshiyuki*; Yagi, Norihiko*; Takagi, Masahide*; et al.
no journal, ,
no abstracts in English
Serizawa, Hiroyuki; Haga, Yoshinori; Machida, Masahiko; Nakamura, Hiroki; Yamanaka, Shinsuke*; Oishi, Yuji*
no journal, ,
Because the shape of a negative crystal is closely related to the morphology of the crystal structure, its formation and growth mechanism is an important subject in the physical sciences. In addition, negative crystals formed in a large single-crystal mass have attracted interest as expensive jewellery because of their mysterious appearance and rarity. However, it is difficult to arbitrarily control the shapes of these polyhedral cavities embedded in a solid medium. Here, we report a discovery on the negative crystal growth process. We found that precipitated helium forms a negative crystal in UO
; the shape changes dramatically with the conditions of helium precipitation. This article discusses the shape transformation mechanism. Our investigation implies that the shapes of negative crystals can be arbitrarily controlled by controlling the precipitation conditions.
Sato, Takahiro; Koka, Masashi; Kada, Wataru; Yokoyama, Akihito; Okubo, Takeru; Yamazaki, Akiyoshi; Ishii, Yasuyuki; Kamiya, Tomihiro
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no abstracts in English
Harada, Satoshi*; Ehara, Shigeru*; Ishii, Keizo*; Sato, Takahiro; Koka, Masashi; Kamiya, Tomihiro
no journal, ,
no abstracts in English
Shibata, Hiromi*; Kono, Yutaka*; Sato, Takahiro; Okubo, Takeru; Yamazaki, Akiyoshi; Ishii, Yasuyuki; Yokoyama, Akihito; Koka, Masashi
no journal, ,
no abstracts in English
Komatsu, Hisanori*; Matsuda, Yasuhiro*; Oki, Saiko*; Hashimoto, Naoki*; Okuyama, Katsushi*; Yamamoto, Hiroko*; Nomachi, Masaharu*; Sugaya, Yorihito*; Yasuda, Keisuke*; Sato, Takahiro; et al.
no journal, ,
no abstracts in English
Shimizu, Yasuo*; Matsuzaki, Shinichi*; Dobashi, Kunio*; Mori, Masatomo*; Sato, Takahiro; Koka, Masashi; Yokoyama, Akihito; Okubo, Takeru; Ishii, Yasuyuki; Kamiya, Tomihiro
no journal, ,
no abstracts in English
Maekawa, Masaki; Kawasuso, Atsuo
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no abstracts in English
Akutsu, Taito*; Tomioka, Satoru*; Nagamine, Takeaki*; Sato, Takahiro; Koka, Masashi; Kamiya, Tomihiro
no journal, ,
no abstracts in English