Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)
- Volume 6 Issue 2
- /
- Pages.111-117
- /
- 2008
- /
- 1738-1894(pISSN)
- /
- 2288-5471(eISSN)
Phoswich Detector for Simultaneous Measuring Alpha/beta Particles
알파/베타선 동시측정용 phoswich 검출기
- Kim, Gye-Hong (Korea Atomic Energy Research Institute) ;
- Park, Chan-Hee (Korea Atomic Energy Research Institute) ;
-
Lee, Kune-Woo
(Korea Atomic Energy Research Institute)
;
-
Jung, Chong-Hun
(Korea Atomic Energy Research Institute)
;
-
Seo, Bum-Kyoung
(Korea Atomic Energy Research Institute)
- Published : 2008.06.30
Abstract
The new type phoswich detector consisting of the ZnS(Ag) and plastic scintillator for alpha/beta-ray simultaneous counting was developed for monitoring radiological contamination inside pipes. The detection performance was estimated using the PSD (pulse shape discrimination) method as a function of distance between the scintillator and radioactive source. The attenuation of particles traveling through a thin film for preventing the detector from being contaminated was experimentally estimated. It is concluded from our investigation that the phoswich detector developed can provide a sufficient alpha/beta-ray discrimination. The application of a thin film for preventing the detector from being contaminated was proven to be feasible.
배관 내부의 방사성 오염도를 측정하기 위한 ZnS(Ag)/플라스틱섬광체 조합의 알파/베타선 동시측정용 phoswich 검출기를 개발하였다. 알파/베타선 동시측정용 phoswich 검출기의 오염위치에 따른 검출 성능을 PSD (Pulse shape discrimination) 방법을 이용하여 평가하였다. 또한, 검출기를 방사성 오염물질로부터 보호하기 위한 오염방지용 필름에 대한 방사선 감쇄 정도를 실험적으로 평가하였다. PSD 방법으로 알파/베타선 분리 정도를 측정한 결과 충분히 알파와 베타선이 분리되었으며 오염방지용 필름의 적용 가능성을 확인하였다.
Keywords