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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Mo-Sung (Department of Physics with Computer, CheongJu University) Woo, Jong-Kwan (Department of Physics, University of Seoul City)
저널정보
대한방사선방어학회 방사선방어학회지 방사선방어학회지 제31권 제4호
발행연도
2006.1
수록면
197 - 201 (5page)

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Daily and seasonal variations of the ambient gamma ray exposure rates were measured by using a pressurized ion chamber from January 2003 to December 2005 in the CheongJu Regional Radiation Monitoring Post and the patterns of the distributions were studied. The annual average of the daily variation of the exposure rate was $\sim0.17{\mu}R/h$. The exposure rate was found to be maximum during 8:00 am to 9:00 am and minimum during 8:00 pm to 10:00 pm. For the annual data, the exposure rate was the minimum during the month of February. The exposure rate increased from February to mid-October (except during the period from May to July with no change) and decreased from October to February. The seasonal variation was found to be about $1{\mu}R/h$. Most of the measured values (96%) of the exposure rates fell under the normal distribution with a deviation of less than 4.8% and the remaining 4% had large fluctuations caused mainly by the rainfalls.

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