Development of dose estimation method using wild animal teeth for low dose exposure

Mitsuyasu, Yusuke*; Oka, Toshitaka; Takahashi, Atsushi*; Koarai, Kazuma; Kino, Yasushi*; Okutsu, Kenichi*; Sekine, Tsutomu*; Yamashita, Takuma*; Shimizu, Yoshinaka*; Chiba, Mirei*; et al.

KEK Proceedings 2021-2, p.91 - 96, 2021/12

We examined whether the ESR dose estimation method could be applied to wild Japanese macaque. In this work, we investigated the enamel preparation protocol and the analytical method of the ESR spectra.

External exposure dose estimation by electron spin resonance technique for wild Japanese macaque captured in Fukushima Prefecture

Oka, Toshitaka; Takahashi, Atsushi*; Koarai, Kazuma; Mitsuyasu, Yusuke*; Kino, Yasushi*; Sekine, Tsutomu*; Shimizu, Yoshinaka*; Chiba, Mirei*; Suzuki, Toshihiko*; Osaka, Ken*; et al.

Radiation Measurements, 134, p.106315_1 - 106315_4, 2020/06

https://doi.org/10.1016/j.radmeas.2020.106315

The relationship between the CO radical intensity and the absorbed dose (dose response curve) of tooth enamel of Japanese macaque was observed by electron spin resonance and the detection limit of our system was estimated to be 33.5 mGy, which is comparable to the detection limit for human molar teeth. Using the dose response curve, external exposure dose for seven wild Japanese macaques captured in Fukushima prefecture were examined. The results suggest that the external exposure dose for the wild Japanese macaques were ranged between 45 mGy to 300 mGy.

Relationship between soft error rate in SOI-SRAM and amount of generated charge by high energy ion probes

Hazama, Masatoshi*; Abo, Satoshi*; Masuda, Naoyuki*; Wakaya, Fujio*; Onoda, Shinobu; Makino, Takahiro; Hirao, Toshio*; Oshima, Takeshi; Iwamatsu, Toshiaki*; Oda, Hidekazu*; et al.

Proceedings of 10th International Workshop on Radiation Effects on Semiconductor Devices for Space Applications (RASEDA-10) (Internet), p.115 - 118, 2012/12

Applications of He neutron spin filters on the small-angle neutron scattering spectrometer SANS-J-II

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Aizawa, Kazuya; Arai, Masatoshi; Noda, Yohei; et al.

Journal of Physics; Conference Series, 294(1), p.012017_1 - 012017_7, 2011/06

https://doi.org/10.1088/1742-6596/294/1/012017

The Frontiers of condensed matter science advanced by J-PARC

Fujii, Yasuhiko; Arai, Masatoshi; Kadono, Ryosuke*; Kanaya, Toshiji*; Kamiyama, Takashi*; Niimura, Nobuo*; Nojiri, Hiroyuki*; Noda, Yukio*; Yagi, Takehiko*; Yamada, Kazuyoshi*

Kotai Butsuri, 43(7), p.441 - 450, 2008/07

http://ci.nii.ac.jp/naid/40016194703

no abstracts in English

Evaluation of the 3-Gev proton beam profile at the spallation target of the JSNS

Meigo, Shinichiro; Noda, Fumiaki*; Ishikura, Shuichi*; Futakawa, Masatoshi; Sakamoto, Shinichi; Ikeda, Yujiro

Nuclear Instruments and Methods in Physics Research A, 562(2), p.569 - 572, 2006/06

https://doi.org/10.1016/j.nima.2006.02.011

no abstracts in English

Overview of results of pre-excavation grouting for 200m level horizontal tunnel at the Mizunami Underground Research Laboratory

Matsui, Hiroya; Mikake, Shinichiro; Takeuchi, Shinji; Noda, Masatoshi*

no journal, , 

Pre-excavation grouting for the shelter at 200m depth horizontal research tunnel at Mizunami Underground Research Laboratory has been carried out at Mizunami, Gifu. The results of pre-grouting and related Lugeon test with 19 boreholes, hydraulic heterogeniety of the rock mass has been understood.

Development of the dynamic injection system for grouting, 2; In-situ tests of dynamic injection system under high water pressure condition

Uyama, Masao*; Noda, Masatoshi*; Noda, Masaru*; Hasegawa, Hiroshi*; Matsui, Hiroya; Suzuki, Yohei*; Hamako, Tadashi*; Tanaka, Yuji*

no journal, , 

Dynamic injection method increase the penetration of grout material and apply the grouting of small and low permeable crack in rock mass. This paper report the results of in-situ dynamic injection under high water pressure condition by using of the developed system reported Part1. This test used the borehole drilled in collaboration study between JAEA and AIST and the budget is a part of contract study from NISA.

SENJU; A New time-of-flight single crystal neutron diffractometer at J-PARC

Kawasaki, Takuro; Oikawa, Kenichi; Tamura, Itaru; Ohara, Takashi; Kaneko, Koji; Kimura, Hiroyuki*; Kiyanagi, Ryoji*; Takahashi, Miwako; Kiyotani, Tamiko*; Arai, Masatoshi; et al.

no journal, , 

SENJU is a new single crystal diffractometer for spallation neutron source in Materials and Life Science Experimental Facility (MLF) at Japan Photon Accelerator Research Complex (J-PARC). It is currently under construction and is scheduled to be complete by spring 2011. The diffractometer is esigned to perform diffraction experiment under various environmental conditions, and the crystal and magnetic structure of materials whose lattice constants up to 50 will be studied. SENJU also shed light on the superlattice reflection or diffuse scattering in the reciprocal lattice space to analyze the local structures as well as phase transitions of the materials. At the beginning, the diffractometer will have 31 two-dimensional scintillation detectors to observe the wide area of reciprocal lattice space by one measurement. Various sample environments will be provided, such as cryogenic cooling and magnetic field.

Construction of a new single crystal neutron diffractometer "SENJU" at J-PARC

Oikawa, Kenichi; Tamura, Itaru; Ohara, Takashi; Kaneko, Koji; Kawasaki, Takuro; Nakamura, Tatsuya; Sakasai, Kaoru; Arai, Masatoshi; Kimura, Hiroyuki*; Kiyanagi, Ryoji*; et al.

no journal, , 

A new single crystal diffractometer SENJU is currently under construction in the MLF BL18 at J-PARC. SENJU is designed to collect diffraction data by use of a laboratory XRD specimen size, and aimed for a precise structure analysis under combined environmental conditions. Very wide variety of experiments will be performed, such as low-temperature, under magnetic field, high pressure, and so on. As for the most important component, detector system, is improved and optimized version of that of the iBIX system which is currently working well. The construction of SENJU will be completed in March 2011, and the instrument will be received the first neutron before summer maintenance period of 2011.