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KMID : 0357520170400040605
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Journal of Radiological Science and Technology
2017 Volume.40 No. 4 p.605 ~ p.611
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Marinelli Beaker Measurement and Self Absorption Correction and Application for Various Environmental Samples in Monte Carlo Simulation
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Jang Eun-Sung
Kim Yang-Su
Lee Sun-Young
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Abstract
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The structure of the actual detector was computed using the code of the PENELOPE. Using the standard mixed sources (450, 1,000㎖), compare the effectiveness of each energy according to various densities and height of the PENELOPE computer simulation, and calculate the effectiveness of the various environmental specimens and apply them to various environmental specimens to determine the lower limit. The values obtained by the obtained value were obtained by applying the obtained efficiency to the actual environmental specimens and obtaining the lower limit values. The density correction factor is 1.155 g of the density correction factor of 0.4 g/㎤ (59.54k eV), 1.153 (661 keV), 1.06 g/㎤ 1.064 (1,836.04k eV), 1.03, and 1.033. It was confirmed that the radioactivity concentration of environmental samples decreased as the amount of specimen was measured increases, and the MDA value decreased as time measured increases.
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KEYWORD
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Self-absorption correction, PENELOPE, HPGe detector, environmental samples, Minimum Detector Activity(MDA)
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