Title: 4$pi$-COUNTER FOR MEASURING ABSOLUTE ACTIVITY OF $beta$-EMITTING MATERIALS
Abstract: Descriptions are given of the design and performance of a 4 pi counter operating with line-supply methane and technical cylinder-supplied methane. Absolute activity measurements of solutions containing radioisotopes with various BETA spectra (Ca/sup 45/, Tl/sup 204/, and P/sup 32/) showed that the accuracy of absolute activity increases with the maximum of BETA -emitter energy. The results of four experiments showed standard deflection for the four experiments determined with 95% accuracy was for P/sup 32/(E /sub max/ = 1.71 Mev) 4.5% and for Ca/sup 45/(E/sub max/- 0.254 Mev) 10%. (R.V.J.)
Publication Year: 1963
Publication Date: 1963-03-01
Language: en
Type: article
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