환경 방사능 처리기술에서의 Compton suppression 및Unsuppression system을 이용한 토양시료의 MDA 측정 = Measurement of MDA of Soil Samples Using Unsuppression System andCompton Suppression of Environmental Radioactivity in ProcessingTechnology

다국어 초록 (Multilingual Abstract)

Compton suppression device is a device by using the Compton scattering reaction and suppress the Comptoncontinuum portion of the spectrum, so can be made more clear analysis of gamma ray peak in the Comptoncontinuum region. Measurements above background occurs or, radioactivity counts of radioactivityconcentration value of 40K nuclides 137Cs and natural radioactivity artificial radioactivity detected from thesurface soil sample, unwanted non-target analysis and interference peak who dotted line you know thecalibration of the measurement energy is allowed to apply the (Compton suppression) non-suppressedspectrum inhibition spectrum and (Compton Unsuppression) the background to the measured value of theactivity concentration value of the standard-ray source is detected relative to the peak of By measuringaccording to the different distances cause 137Cs, and comparative analysis of the Monte Carlo simulation, inorder to obtain a detection capability for efficient, looking at the Compton inhibitor, as the CSF value increaseswith increase in the distance, more It was found that the background due to Compton continuum of themeasured spectrum suppression mode Compton unrestrained mode can know that the Compton suppressionmany were made, using a 137Cs is reduced.

국문 초록 (Abstract)

Compton suppression 장치는 Compton 산란 반응을 이용하여, 스펙트럼의 Compton continuum 부분을 억제함으로써 Compton continuum 영역 내에서의 감마선 피크들의 분석을 보다 명확하게 할 수 있게 해주는 장치이다. 표층토양시료에서 검출된 인공 방사능인 137Cs과 자연 방사능인 40K핵종의 방사능 농도 값들에 대한 방사능 계수치가 백그라운드를 상회하는 측정값이 발생되거나, 불필요한 방해피크나 비해석 대상 피크에 대하여 검출된 표준선원의 방사능 농도값들의 실측치에 대한 background를 비억제 스펙트럼(Compton Unsuppression)과 억제 스펙트럼(Comptonsuppression)을 적용시켜 측정 에너지에 대한 교정을 알고자 점선원인 137Cs을 거리별에 따라 측정하여, 몬테칼로 시뮬레이션과 비교 분석함으로서 효율적인 검출 능력을 얻고자 함이며, Compton 억제 인자를 보면 거리가 멀어짐에 따라CSF 값이 클수록 더 많은 Compton suppression가 이루어졌음을 알 수 있고, 137Cs을 이용한 컴프턴 비억제 모드와 억제모드로 측정된 스펙트럼에서 컴프턴 연속에 의한 백그라운드가 감소함을 알 수 있었다.

참고문헌 (Reference)

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