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http://dx.doi.org/10.17946/JRST.2017.40.4.10

Marinelli Beaker Measurement and Self Absorption Correction and Application for Various Environmental Samples in Monte Carlo Simulation  

Jang, Eun-Sung (Dept. of Nuclear physics and Radiation Technology Research Center, Pusan National University)
Gim, Yang-Soo (Dept. of Radiation Oncology, Chonbuk National University Hospital)
Lee, Sun-Young (Department of Radiation Oncology, Institute for Medical Sciences, Chonbuk National University Medical School)
Publication Information
Journal of radiological science and technology / v.40, no.4, 2017 , pp. 605-611 More about this Journal
Abstract
The structure of the actual detector was computed using the code of the PENELOPE. Using the standard mixed sources (450, 1,000 ml), 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 $0.4g/cm^3$ (59.54keV), 1.153 (661 keV), $1.06g/cm^3$ 1.064 (1,836.04keV), 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.
Keywords
Self-absorption correction; PENELOPE; HPGe detector; environmental samples; Minimum Detector Activity(MDA);
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