Radiation detectors

▶ 검출기 : scintillator, ZnS(Ag) adhered to 0.03 cm (0.01 in.)

                 thick plastic scintillation material

▶ 광전자증배관 : 3.8 cm (1.5 in.) diameter▶ 효율 (4π) : 20%–239Pu

▶ 동작 전압 : typically 500–1200 volts

▶ 윈도우 : 1.2 mg/cm² metalized polyester

▶ 윈도우 면적 : 75 cm² open

▶ 백그라운드 : alpha - less than 3 cpm; beta - typically 300 cpm or less

▶ NON-UNIFORMITY: less than 10%

▶ 효율 (4π): 30% for 239Pu; 30% for 90Sr/Y; 4% for 14C

▶ CROSS TALK:

                       alpha to beta - less than 10%

                       beta to alpha - less than 1%

▶ 크기 : 12.2 x 24.9 cm (4.8 x 9.8 in.) (Dia x L)

▶ 무게 : 0.9 kg (2 lb)