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No.87 (2009/3) >

Title :沖縄県那覇市における空間γ線線量率の分布
Title alternative :Distribution of gamma radiation dose rate in air in Naha city, Okinawa prefecture
Authors :本村, 大
益田, 和
向, 真希
外間, 智規
古川, 雅英
Authors alternative :Motomura, Dai
Masuda, Nagi
Mukai, Maki
Hokama, Tomonori
Furukawa, Masahide
Issue Date :Mar-2009
Abstract :The absorbed dose rates in air due to terrestrial gamma radiation in Naha city were measured at 1008 points with Nal(Tl) scintillation spectrometers. The mean, minimum and maximum dose rates were estimated to be 38.5nGy/h, 13.7nGy/h, 103.0nGy/h, respectively. The concentrations of ^<40>K, ^<238>U-serise and ^<232>Th-serise in the geologic and soil samples from Naha city were determined with a Ge semiconductor detector. Based on these results, the minimum and maximum of the dose rates were estimated to be 0.6nGy/h (Ryukyu Limestone) and 104.5nGy/h (Dark red soil), respectively.
Type Local :紀要論文
ISSN :0286-9640
Publisher :琉球大学理学部
URI :http://hdl.handle.net/20.500.12000/9527
Citation :琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus no.87 p.69 -75
Appears in Collections:No.87 (2009/3)

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