Self-absorption correction in determining the super(238)U activity of soil samples via 63.3 keV gamma ray using MCNP5 code
The essential issue in analyzing the activity of super(238)U in an HPGe detector based gamma spectrometer via 63.3 keV line is relating to the strong self-absorption of this weak gamma ray in sample material. The present work suggests a method of the self-absorption corrections for 63.3 keV gamma ra...
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Published in | Applied radiation and isotopes Vol. 71; no. 1; pp. 11 - 20 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
01.01.2013
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Abstract | The essential issue in analyzing the activity of super(238)U in an HPGe detector based gamma spectrometer via 63.3 keV line is relating to the strong self-absorption of this weak gamma ray in sample material. The present work suggests a method of the self-absorption corrections for 63.3 keV gamma rays by a combination of experimental measurements and Monte Carlo MCNP5 calculations. The effects of sample chemical composition, density and geometry were calculated in terms of self-attenuation factors. The method, developed for a cylindrical sample geometry, accounted for variable sample heights and densities. The analysis of super(238)U activity was applied for three main soil types in Vietnam, which are grey, alluvial and red soils. The results obtained with the above outlined method were in good agreement with those derived by other methods. |
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AbstractList | The essential issue in analyzing the activity of super(238)U in an HPGe detector based gamma spectrometer via 63.3 keV line is relating to the strong self-absorption of this weak gamma ray in sample material. The present work suggests a method of the self-absorption corrections for 63.3 keV gamma rays by a combination of experimental measurements and Monte Carlo MCNP5 calculations. The effects of sample chemical composition, density and geometry were calculated in terms of self-attenuation factors. The method, developed for a cylindrical sample geometry, accounted for variable sample heights and densities. The analysis of super(238)U activity was applied for three main soil types in Vietnam, which are grey, alluvial and red soils. The results obtained with the above outlined method were in good agreement with those derived by other methods. |
Author | Binh, Do Quang An, Vo Xuan Huy, Ngo Quang Loan, Truong Thi Hong Can, Nguyen Thanh |
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Title | Self-absorption correction in determining the super(238)U activity of soil samples via 63.3 keV gamma ray using MCNP5 code |
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