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Journal Articles

Calculation of conversion factor for estimation of $$^{131}$$I concentrations in the air from pulse-height distribution observed by NaI(Tl) detector in monitoring posts

Yamada, Junya; Hashimoto, Makoto; Seya, Natsumi; Haba, Risa; Muto, Yasunobu; Shimizu, Takehiko; Takasaki, Koji; Yokoyama, Sumi*; Shimo, Michikuni*

Radioisotopes, 65(10), p.403 - 408, 2016/10

The purpose of this study is to develop a quick method for estimation of $$^{131}$$I concentrations in the air using data measured by monitoring posts. In this method, $$^{131}$$I concentrations were estimated by multiplying $$^{131}$$I count rates at the full-energy peak measured with a NaI(Tl) detector by a concentration conversion factor. The concentration conversion factor for monitoring posts in JAEA Oarai Center was calculated with an EGS5 Monte Carlo code. As a result, the concentration conversion factor for an infinite-air-source was 25.7 Bq/m$$^{3}$$/cps.

Oral presentation

Study on estimation of I-131 concentrations in atmosphere using measured data by monitoring posts

Yamada, Junya; Seya, Natsumi; Haba, Risa; Muto, Yasunobu; Hashimoto, Makoto; Shimizu, Takehiko; Takasaki, Koji; Yokoyama, Sumi*; Shimo, Michikuni*

no journal, , 

no abstracts in English

Oral presentation

Comparison of I-131 concentrations in atmosphere estimated from pulse-height distribution observed by NaI(Tl) detector at monitoring posts and evaluated from air sampling

Yamada, Junya; Seya, Natsumi; Haba, Risa; Muto, Yasunobu; Hashimoto, Makoto; Shimizu, Takehiko; Takasaki, Koji; Yokoyama, Sumi*; Shimo, Michikuni*

no journal, , 

no abstracts in English

Oral presentation

Advancement of airborne radiation measurement technology, 2-1; Investigation of effects of radon progeny nuclides on aerial monitoring

Hirouchi, Jun; Shimada, Kazumasa; Nishizawa, Yukiyasu; Sanada, Yukihisa; Munakata, Masahiro

no journal, , 

no abstracts in English

Oral presentation

Study on reasonable dose estimation by Albedo method for radiation streaming through an entranceway, 6; Monte Carlo analysis for multiple scattering

Matsuda, Norihiro; Wada, Ayumi*; Nobuhara, Fumiyoshi*; Hirao, Yoshihiro*

no journal, , 

no abstracts in English

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