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Journal Articles

Observation of morphological abnormalities in silkworm pupae after feeding $$^{137}$$CsCl-supplemented diet to evaluate the effects of low dose-rate exposure

Tanaka, Sota; Kinouchi, Tadatoshi*; Fujii, Tsuguru*; Imanaka, Tetsuji*; Takahashi, Tomoyuki*; Fukutani, Satoshi*; Maki, Daisuke*; Notomi, Akihiro*; Takahashi, Sentaro*

Scientific Reports (Internet), 10, p.16055_1 - 16055_7, 2020/09

https://doi.org/10.1038/s41598-020-72882-y
 Times Cited Count：7 Percentile：49.75(Multidisciplinary Sciences)

Since the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, morphological abnormalities of the lepidopteran insects have been reported. However, it is unclear whether the abnormalities were caused directly by radiation because they did not study on absorbed dose and dose-effect relationship. In this study, we conducted an internal exposure experiment on silkworm using $$^{137}$$CsCl-supplemented artificial diet and estimated the absorbed dose to evaluate the morphological abnormalities in silkworm. The ratio of wing to whole body of pupae was compared between the $$^{137}$$CsCl-exposured and control groups and no significant differences were observed between the groups. This result suggest that morphological abnormalities in lepidopterans are unlikely due to direct radiation effects from $$^{137}$$Cs contamination after the FDNPP accident.

Journal Articles

Radiation distribution measurement using plastic scintillating optical fibers for survey of radioactive contamination in wide area

Ito, Chikara; Ito, Keisuke; Ishikawa, Takashi; Yoshida, Akihiro; Sanada, Yukihisa; Torii, Tatsuo; Notomi, Akihiro*; Wakabayashi, Genichiro*; Miyazaki, Nobuyuki*

Hoshasen, 39(1), p.7 - 11, 2013/09

no abstracts in English

Journal Articles

On-line evaluation of spatial dose-distribution by using a 15m-long plastic scintillation-fiber

Notomi, Akihiro*; Sugiura, Nobuyuki*; Ito, Tetsuo*; Imamichi, Shoji*; Torii, Tatsuo; Noma, Hiroshi*

KEK Proceedings 2008-14, p.11 - 19, 2009/01

A 15 m-long plastic scintillation fiber (PSF) detector has been applied to the on-line evaluation of spatial dose-distribution inside the room of a low power research-reactor. It was found that the present PSF detector has enough performance as the real-time measurement system which is not only quick and simple but also reliable for monitoring use in that situation. Such application may be also useful at the medical fields which routinely use radio isotopes for diagnosis purposes (such as PET facility). From the present observation, it seems that the practically-acceptable maximum limit of PSF length is at most 15 m. More than this, the severe signal reduction brings unavoidable difficulties for the following signal processing.

JAEA Reports

Polarized proton induced breakup of $$^{12}$$C at 16 MeV

*; Watanabe, Yukinobu*; *; *; *; Notomi, Akihiro *; S.Widodo*; *; *; *; et al.

JAERI-M 92-029, 46 Pages, 1992/03

JAERI-M-92-029.pdf:1.46MB

no abstracts in English

Oral presentation

Radiation measurement to research the contamination of radioactive materials in the environment

Ito, Chikara; Sanada, Yukihisa; Ito, Keisuke; Kondo, Atsuya; Ishikawa, Takashi; Nakano, Hironobu; Nozaki, Tatsuo; Torii, Tatsuo; Notomi, Akihiro*

no journal, , 

no abstracts in English

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