신형 TL 선량계인 $CaSO_4:Dy,P$를 이용한 Hp(10) 측정용 배지의 필터체계 설계
김현기;권정완;이재기;김장렬;
Design of a Badge Filter System for Measurement of Hp(10) with the New Type of TL Dosimeter $CaSO_4:Dy,P$
Kim, H.K.;Kwon, J.W.;Lee, J.K.;Kim, J.L.;
ABSTRACT
This study was intended to estimate Hp(10) recommended by the ICRU using the $CaSO_4:Dy,P$ element developed in the KAERI. For the estimation of Hp(10), TL response should be compensated properly through the energy range using filter materials since $CaSO_4:Dy,P$ is of severe photon energy dependent response. Various experiments and computations using Monte Carlo Code were carried out for designing filter satisfying the performance requirements of the ISO related to TL dosimeter. Under the completed filter, the relative response of $CaSO_4:Dy,P$ showed $0.75{sim}1.0$ for photons in the range of $20{sim}662keV$. Especially it was possible to reduce the thickness of front filter and simplify the filter combination with rear filter of larger diameter and to considerably improve angular dependence by introducing taper to the filler.
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