利用切伦科夫辐射快速筛查水和牛奶样品中的锶-90活度。
Rapid screening of 90Sr activity in water and milk samples using Cherenkov radiation.
作者信息
Stamoulis K C, Ioannides K G, Karamanis D T, Patiris D C
机构信息
Archaeometry Center, University of Ioannina, 45110 Ioannina, Greece.
出版信息
J Environ Radioact. 2007;93(3):144-56. doi: 10.1016/j.jenvrad.2006.12.007. Epub 2007 Feb 12.
A method for screening 90Sr in milk samples is proposed. This method is based on a liquid scintillation technique taking advantage of Cherenkov radiation, which is produced in a liquid medium and then detected by the photomultipliers of a Liquid Scintillation Counter (LSC). Twenty millilitres of water and milk samples spiked with various concentrations of 90Sr/90Y in equilibrium were added in plastic vials and then were measured with an LSC (TriCarb 3170 TR/SL). The derived efficiencies were 49% for water samples and 14% for milk samples. The detection limit was 470 mBq L(-1)(90)Sr for water, without any pretreatment. Milk contains potassium, which also produces Cherenkov radiation due to the presence of 40K. For this reason, the interference of 40K in the measurements of 90Sr in milk samples was also investigated. The detection limit for milk was 1.7 Bq L(-1)90Sr.
提出了一种检测牛奶样品中90Sr的方法。该方法基于利用切伦科夫辐射的液体闪烁技术，切伦科夫辐射在液体介质中产生，然后由液体闪烁计数器（LSC）的光电倍增管进行检测。将20毫升添加了各种浓度处于平衡状态的90Sr/90Y的水和牛奶样品加入塑料瓶中，然后用LSC（TriCarb 3170 TR/SL）进行测量。水样品的衍生效率为49%，牛奶样品的衍生效率为14%。未经任何预处理时，水的检测限为470 mBq L(-1)(90)Sr。牛奶中含有钾，由于40K的存在，钾也会产生切伦科夫辐射。因此，还研究了40K在牛奶样品90Sr测量中的干扰。牛奶中90Sr的检测限为1.7 Bq L(-1)。
Zotero 插件