液闪谱仪对^(90)Sr和^(90)Y的测量方法研究  

Study on Determination of ^(90)Sr and ^(90)Y by Liquid Scintillation Spectrometry

作　　者：吴连生[1] 陈超峰[1] 张兵[1] 曾帆[1] 钦红娟 沙向东 上官志洪[1] 

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《原子能科学技术》2016年第1期46-53,共8页Atomic Energy Science and Technology

摘　　要：使用Sr-Spec树脂对^(90)Sr-^(90) Y进行分离后采用液闪谱仪对^(90) Sr和^(90) Y的效率刻度和猝灭校正进行了系统研究,确定了^(90) Y效率刻度所用化学回收率,考察了闪烁液种类、载体加入、烘干处理、放置时间、化学猝灭对^(90)Sr和^(90) Y效率刻度的影响及其校正方法。结果表明:GoldStar LT^2闪烁液适用于^(90) Sr和^(90) Y的测量,^(90)Sr刻度源是否烘干和^(90) Y刻度源有无钇载体对切伦科夫效率刻度无影响;^(90) Y的效率刻度应在^(90)Sr-^(90) Y分离后10h内完成,并且有无钇载体对^(90) Y的液闪测量效率无影响;^(90)Sr的刻度源应经过烘干处理,也应在^(90)Sr-^(90) Y分离后10h内完成测量。当待测样品与效率刻度源的制备方法相同,且待测样品的SQP(E)值在偏离标准样品SQP(E)值8.9%范围内时,可直接使用相对测量法。Efficiency calibrations and quenching calibrations of 90^ Sr and 90^ Y separated from Sr-Spec resin by liquid scintillation spectrometry were investigated.The chemical recovery of -（90） Y for efficiency calibration was determined.The quenching calibration method and the effects of efficiency calibration,such as liquid scintillation cocktails,addition of carrier,drying,storage time,chemical quenching were studied.The results show that GoldStar LT-2 is suitable for determinations of 90^ Sr and 90^ Y.Whether drying of 90^ Sr calibration source or not and yttrium carrier addition of 90^ Y calibration source or not,there is no effect on the Cerenkov efficiency calibration.The efficiency calibration of 90^ Y should be completed within 10 hafter the separation of 90^ Sr and 90^ Y.90^ Sr source should be dried before measurement,and its efficiency calibration should be completed within 10 h.When the preparation method of sample is as same as efficiency calibration source,and the SQP（E）value of sample deviates from that of the standard sample within the range of 8.9%,relative measurement method can be used directly.

关 键 词：液闪谱仪 90Sr 90Y 探测效率 猝灭校正 

分 类 号：O614.232[理学—无机化学]