【摘要】 研制了一种可同时测量αβ表面污染的测量仪。探测器面积 38.6cm2 。仪器的α探测效率(2 39Puα源 ,活性区直径 5 0 mm)≥ 30 % ,本底≤ 2计数· min-1;β探测效率 (90 Sr- 90 Yβ源 ,活性区直径5 0 mm)≥ 30 % ,本底≤ 60计数·min-1。更多还原

【Abstract】 This report describes a α and β surface contamination meter. Area of its detector is 38.6cm 2 . Detection efficiency is≥30% for the sources of both 239 Pu and 90 Sr 90 Y.Mean background is≤2 counts/min and≤60 counts/min respectively.更多还原