$^{133}Ba$ 용액의 방사능 절대측정의 국제비교

• Park, Tae-Soon (Radiation Standards Laboratory, Korea Standards Research Institute) ;
• Oh, Pil-Jae (Radiation Standards Laboratory, Korea Standards Research Institute) ;
• Hwang, Sun-Tae (Radiation Standards Laboratory, Korea Standards Research Institute)
• 박태순 (한국표준연구소.방사선표준연구실) ;
• 오필제 (한국표준연구소.방사선표준연구실) ;
• 황선태 (한국표준연구소.방사선표준연구실)
• Published : 1985.12.20

Abstract

The activity measurement of a solution of $^{133}Ba$ which is an electron capture nuclide was carried out by the ${\beta}-{\gamma}$ coincidence method. The counting rates at the ${\beta}-,\;{\gamma}-$, and coincidence-channels were measured using a $4{\pi}$ proportional counter and two NaI(Tl) scintillation detectors. The specific activity of the solution calculated by the efficiency extrapolation was $(1151.01{\pm}2.99)kBqg^{-1}$ at the reference time(00h UT, 03-15-84). According to an international comparison of activity measurements organized by the Bureau International des Poids et Mesures, this result showed the difference of 0.94% to the mean value derived from the comparison.