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J Radiat Prot > Volume 24(1); 1999 > Article
Journal of Radiation Protection 1999;24(1):39-0.
얇은 LiF:Mg,Cu,Na,Si 검출기의 베타선장에 대한 TL 반응
남영미;김장렬;장시영;조현우;김현자;
Thermoluminescent Response of Thin LiF:Mg,Cu,Na,Si Detectors to Beta Radiation
Nam, Y.M.;Kim, J.L.;Chang, S.Y.;Cho, H.W.;Kim, H.J.;
ABSTRACT
Thermoluminescent (TL) response characteristics of a thin LiF:Mg,Cu,Na,Si Teflon detectors have been studied for use in beta radiation detection. The detectors were fabricated from a mixture of LiF:Mg,Cu,Na,Si phosphor and Teflon powder which was molded into a thin disk form of $50mg/cm^2$ thickness. These detectors were irradiated to beta fields of $^{147}Pm,;^{204}Tl;and;^{90}Sr/^{90}Y$ sources with a covering of Kapton foil ($2mg/cm^2$) and photon irradiation was carried out with a $^{137}Cs$ source at the Korea Atomic Energy Research Institute (KAERI). Batch uniformity was estimated to be 4.7% and the beta dose response presented linear relationship from 0.1 mGy to 100 Gy. The beta energy responses of thin detectors normalized to $^{137}Cs$ were presented as 0.46, 1.09 and 1.06 for $^{147}Pm,;^{204}Tl;and;^{90}Sr/^{90}Y$ beta rays, respectively. The evaluated values for angular responses were $0.93{pm}0.03;(^{147}Pm),;0.94{pm}0.04;(^{204}Tl),;and;0.92{pm}0.05;(^{90}Sr/^{90}Y)$. The results satisfied well a proposed ISO Standard for beta ray dosimeters.
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