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KMID : 1151820140080060293
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Journal of the Korean Society of Radiology
2014 Volume.8 No. 6 p.293 ~ p.299
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Measurement of MDA of Soil Samples Using Unsuppression System and Compton Suppression of Environmental Radioactivity in Processing Technology
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Kang Soo-Man
Im In-Chul
Lee Jae-Seung
Jang Eun-Sung
Lee Mi-Hyeon
Kwon Kyung-Tae
Kim Chang-Tae
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Abstract
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Compton suppression device is a device by using the Compton scattering reaction and suppress the Compton continuum portion of the spectrum, so can be made more clear analysis of gamma ray peak in the Compton continuum region. Measurements above background occurs or, radioactivity counts of radioactivity concentration value of 40K nuclides ¹³?Cs and natural radioactivity artificial radioactivity detected from the surface soil sample, unwanted non-target analysis and interference peak who dotted line you know the calibration of the measurement energy is allowed to apply the (Compton suppression) non-suppressed spectrum inhibition spectrum and (Compton Unsuppression) the background to the measured value of the activity concentration value of the standard-ray source is detected relative to the peak of By measuring according to the different distances cause ¹³?Cs, and comparative analysis of the Monte Carlo simulation, in order to obtain a detection capability for efficient, looking at the Compton inhibitor, as the CSF value increases with increase in the distance, more It was found that the background due to Compton continuum of the measured spectrum suppression mode Compton unrestrained mode can know that the Compton suppression many were made, using a ¹³?Cs is reduced.
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KEYWORD
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MDA, Compton Suppression, soil samples, environmental radioactivity, Basal activity
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