Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Soil Samples in 134Cs of the 604, 795 keV Spectrum Analysis

토양시료 속 134Cs의 604, 795 keV 에너지 스펙트럼 분석

  • Jang, Eunsung (Pusan National University Nuclear Physics and Radiation Technology Research Center)
  • 장은성 (부산대학교 핵과학연구소)
  • Received : 2014.10.28
  • Accepted : 2014.12.25
  • Published : 2014.12.30
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Abstract

$^{134}Cs$ radioactive concentration among soil samples is difficult to classify due to the background impact on crust originated natural radioactive nuclide, and overlapping and interfering between peaks. The ways to identify true peaks in gamma-ray spectroscopy are as follows to reduce statistical fluctuation by smoothing based on the fact that the shapes of peak are mostly Gaussian, to inspect the levels of width and height of peaks, to add functions on low-energy trailing phenomena, or 4) to check the peaks after modifying Gaussian function itself. Therefore, it is considered that information and knowledge for spectrum analysis are necessary.

토양 시료 중에 극미량의 $^{134}Cs$ 방사능 농도는 지각 기원자연방사성 핵종들에 의한 background의 영향 및 피크간의 중첩 및 간섭으로 구분하기가 어렵다. 감마선 분광학에서 참 피크의 식별은 피크의 모양이 대체로 Gaussian임을 고려하여 smoothing에 의해 통계적 요동을 감소시켜 보거나 피크의 폭이나 솟아오름의 정도를 검사하거나, 저에너지 tailing 현상에 대한 함수를 추가하거나 Gaussian 함수자체를 변형시켜 확인 할 수 있었다. 그러므로 스펙트럼 분석에 대한 정보와 지식이 필요할 것으로 사료된다.

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