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Report No.

Development of emergency monitoring system for radionuclide emitting alpha-ray in the air

Hokama, Tomonori; Fujita, Hiroki; Iimoto, Takeshi*

It is important to monitor alpha-ray emitting radionuclides in an airborne sample in case of emergency such as nuclear and radiation accidents. However, it was difficult to assess concentrations of their artificial alpha-ray emitting radionuclides because of the abundance of natural radionuclides. In this research, I develop the emergency monitoring system for artificial radionuclides emitting alpha-ray such as plutonium in the air, using survey meter and multiple time interval analysis. The detection limit of this developed monitoring system was 2.5$$times$$10$$^{-8}$$ Bq cm$$^{-3}$$ in concentration of artificial radionuclide in the air.



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