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No.100 (2015/9) >

 
Title :沖縄島の陸水中ラドン濃度
Title alternative :Radon Concentration of Inland Water in Okinawa Island, Japan
Authors :富濱, まどか
山入端, 茜
古川, 雅英
Authors alternative :Tomihama, Madoka
Yamanoha, Akane
Furukawa, Masahide
Issue Date :30-Sep-2015
Abstract :As a part of study to estimate the background radiation level in Japan, radon (^<222>Rn) concentrations of inland waters collected from Okinawa Island, main island of Okinawa prefecture, were measured with a simple liquid scintillation counter. The radon is an alpha emitting natural radioactive element with half-life of 3.8 days originated from the decay of ^<238>U. The arithmetic mean± standard deviation of the concentration of subsoil waters collected at 29 points was calculated to be 23.1±6.3 Bq L^-1 Relatively high concentrations of 36 Bq L^ -1 and 43 Bq L^-1 were found in Motobu area, northwestern part of the island. Also the concentrations of ground water samples collected at 4 points in Gyokusen-dou, a limestone cave in the southern part of the island, were estimated to be ND (< 2.3 Bq L^-1) - 4.6 Bq L^- 1.
Type Local :紀要論文
ISSN :0286-9640
Publisher :琉球大学理学部
URI :http://hdl.handle.net/20.500.12000/32494
Citation :琉球大学理学部紀要 = BULLETIN OF THE FACULTY OF SCIENCE UNIVERSITY OF THE RYUKYUS no.100 p.1 -4
Appears in Collections:No.100 (2015/9)

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