BH1216型低本底α β测量仪性能研究及其应用

Measurement of properties of Model FH1216 Low Background α and β Measuring Instrument and its applications

对国产 BH12 16型低本底 αβ测量仪的性能进行了研究和实际测量。仪器对 2 39Puα源的 2 π效率≥ 80 %时 ,本底计数≤ 0 .0 0 5 / cm-2·min-1;对 90 Sr90 Yβ源的 2 π效率≥ 60 %时 ,本底计数≤ 0 .15 /cm-2 · min-1。

This report describes an α and β radiation system of the background. A single 200mm×30mm plastic scintillator is used as guard detector. 90 Sr 90 Y β counting efficiency is 60% (2π) with typical background of 0.15 cm -2 ·min -1 , α counting efficiency for 239Pu is 70%(2π)with typical background of 0.005 cm -2 ·min -1 .