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[en] Have been carried out the experiment to determine the operation voltage, instrument stability, counting efficiency, figure of merit, and minimum detectable activity. This instrument used to count gross alpha and gross beta. This instrument belongs good stability at the confidence level of 95 % and the background count that was 0,144 cpm for alpha and 22,65 cpm for beta. The counting efficiency was 27,41 % (electrodeposition of Am-241), 6,57 % (deposition of Am-241), 51,82 % (deposition of Sr-90). The limit of detectable activity was 1,04 x 10 exp.-2 Bq (electrodeposition of Am-241), 4,35 x 10 exp.-2 Bq (% deposition of Sr 90)
Source
Fathony, M.; Hiswara, Eri (National Nuclear Energy Agency, Serpong (Indonesia)) (eds.); Centre for Research and Development of Radiation Safety and Nuclear Biomedicine, National Nuclear Energy Agency, Serpong (Indonesia); 269 p; ISSN 0854-4085; 
; Sep 2000; p. 158-168; 8. Scientific Presentation: Environment and Radiation Safety; Presentasi Ilmiah Keselamatan Radiasi Dan Lingkungan VIII; Jakarta (Indonesia); 23-24 Aug 2000; Also available from from Center for Development of Informatics and Computation Technology, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 5 refs.; 6 tabs.; 5 figs.
; Sep 2000; p. 158-168; 8. Scientific Presentation: Environment and Radiation Safety; Presentasi Ilmiah Keselamatan Radiasi Dan Lingkungan VIII; Jakarta (Indonesia); 23-24 Aug 2000; Also available from from Center for Development of Informatics and Computation Technology, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 5 refs.; 6 tabs.; 5 figs.