Samardžić Selena, Milošević Miodrag, Todorović Nataša, Lakatoš Robert
Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, 21000 Novi Sad, Serbia.
PC "Nuclear Facilities of Serbia", Mike Petrovića Alasa 12-14, Vinča, 11351 Belgrade, Serbia.
Appl Radiat Isot. 2018 Jul;137:199-204. doi: 10.1016/j.apradiso.2018.04.002. Epub 2018 Apr 4.
The development of new methods and improvements of existing methods for the specific activity determination of Sr and other distinct beta emitters has been of considerable interest. The reason for this interest is that the notably small number of methods that are able to meet all the set criteria, such as reliability of the results, measurement uncertainty and time, and minimum production of radioactive waste, as well as applicability to various samples with reference to their nature, geometry and composition. In this paper, two methods for rapid Sr activity determination based on Monte Carlo simulations are used, one for a Si semiconductor detector for beta spectrometric measurements and the other for the Geiger-Muller (GM) ionization probe. To improve the reliability of the measurement results, samples with high and low strontium activity solutions were prepared in the form of dry residues. The results of the proposed methodology were verified with a standard method using a liquid scintillation counter, and notably good agreements are achieved.
开发用于锶及其他不同β发射体比活度测定的新方法以及改进现有方法一直备受关注。产生这种关注的原因是，能够满足所有既定标准的方法数量显著较少，这些标准包括结果的可靠性、测量不确定度和时间、放射性废物的最小产生量，以及针对各种样品的性质、几何形状和组成的适用性。本文采用了两种基于蒙特卡罗模拟的快速锶活度测定方法，一种用于β能谱测量的硅半导体探测器，另一种用于盖革 - 弥勒（GM）电离探头。为提高测量结果的可靠性，以干残渣形式制备了高锶活度溶液和低锶活度溶液的样品。所提出方法的结果通过使用液体闪烁计数器的标准方法进行了验证，并且取得了显著良好的一致性。
