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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 1,259 - 1,265 (7page)
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A beta ray scanner was proposed for in-situ discrimination of beta and gamma ray radioactivity. This scanner is based on the principle that gamma and beta rays experience different changes in detection efficiency in scintillators with different geometries, especially with regard to the scintillator thickness. The ratios of the counting rates of gamma rays (Rgamma), beta rays (Rbeta), and sample measurements (Rtotal) in a thick scintillator to those in a thin one are reported. The parameter Xthick, which represents the counting rate contributed by beta rays to the total counting rate in the thick scintillator, was derived as a function of those ratios. The values of Rgamma and Rbeta for 60Co and 90Sr sources were estimated as 3.2 ± 0.057 and 0.99 ± 0.0049, respectively. The estimated beta ray contributions had relative standard deviations of 2.05e4.96%. The estimated range of the beta rays emitted from 90Sr was 19 mm as per the Monte Carlo N-Particle simulation, and this valuewas experimentally verified. Homogeneous and surface contaminations of 60Co and 90Sr-90Y were simulated for application of the proposed method. The counting rate contributed by the beta rays was derived and found to be proportional tothe concentration of 90Sr-90Y contamination.
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참고문헌 (24)
참고문헌 신청
조동건 / 2011 / RADIOLOGICAL CHARACTERISTICS OF DECOMMISSIONING WASTE FROM A CANDU REACTOR / Nuclear Engineering and Technology 43(6):583~592
M. F. L'Annunziata / 2012 / Handbook of Radioactivity Analysis / Academic Press :576~609
C. Miro / 2012 / Caesium-137 and strontium-90temporal series in the Tagus river: experimental results and a modelling study / J. Environ. Radioact 113:21~31
H. Miyoshi / 2013 / Preparation of paper scintillator for detecting H-3contaminant / Radiat. Prot. Dosim 156:277~282
C. H. Shao / 2014 / Monitoring of radiation dose rates around a clinical nuclear medicine site / Radiat. Phys. Chem 104:124~128
M. F. L'Annunziata / 2012 / Handbook of Radioactivity Analysis / Academic Press :576~609
C. Miro / 2012 / Caesium-137 and strontium-90temporal series in the Tagus river: experimental results and a modelling study / J. Environ. Radioact 113:21~31
H. Miyoshi / 2013 / Preparation of paper scintillator for detecting H-3contaminant / Radiat. Prot. Dosim 156:277~282
C. H. Shao / 2014 / Monitoring of radiation dose rates around a clinical nuclear medicine site / Radiat. Phys. Chem 104:124~128
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