BH1217B型双路大面积半导体探测器弱αβ测量仪

Model BH1217B Double Channel Weak αβRadiation MeaSuring Instrument With Large Area Semiconductor Detector

本文描述了ＢＨ１２１７Ｂ型双路大面积半导体探测器弱αβ测量仪。它是一种最新研制的测量低水平αβ放射性的先进仪器。对￣（２３９）ｐｕα参考源的２π探测效率≥８５％（典型值９０％），本底的典型值为０，０１５／ｃｍ￣２·ｈ和对￣（９０）Ｓｒ－￣（９０）Ｙβ参考源的２π探测效率≥４０％（典型值５０％），本底的典型值为０；０３／ｃｍ￣２·ｈ。α对β的混道≤１％，β对α的混道为零。该仪器的数据采集、数据管理、数据分析全部由计算机完成。

Model BH1217B double channel measuring instrument for monitoring weak αβradiationwith large area semiconductor detector has been discribed in this paper.In case of 2πdetectionefficiency≥85%(typical value 90%)for ￣(239)Pu with typical background of 0.015cm￣(-2)·h￣(-2),and≥40%(typical value 50%)for ￣(90)Sr -￣(90)Y with typical background of 0.03cm￣(-2) ·min￣(-1) .Counting efficiency for αentering βchannel:<1%,and for βentering αchannel:0.Data collec-tion,data control and data processing are all computer. (