Age dating of liquid 90Sr-90Y sources

In the context of age dating of 90Sr, the selective adsorption of zirconium ions from the mixture with strontium and yttrium by adsorbents based on TiO2 with a chemically modified surface was investigated. The general features of the separation process of strontium, yttrium, and zirconium in batch conditions were determined. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to analyze the initial and residual concentrations of the studied cations. Separation of 90Zr and 90Sr from solutions 90Sr-90Y sources using adsorbents based on TiO2 was performed for the first time. The ratio of 90Zr/90Sr was calculated, and the Age of liquid 90Sr-90Y sources was determined. In addition, we studied the age-dating of 90Sr-90Y sources using a combination of liquid-scintillation counting of 90Sr and ICP-MS analysis. The results of both methods – the method of age-dating with the chemical separation of isotopes and the combination of LSC and ICP-MS analysis – agree very well and thus serve for cross-validation. Moreover, the combination of the two methods increases the confidence in the age dating results of 90Sr-90Y sources.

VASYLYEVA Hanna;  MIRONYUK Ivan;  STRILCHUK Mykola;  MAYER Klaus;  DALLAS Liz;  TRYSHYN V. V.;  MALIUK I.A.;  HRYHORENKO Maryna;  ZHUKOV Oleksandr;  SAVKA Khrystyna; 

2023-09-01

PERGAMON-ELSEVIER SCIENCE LTD

JRC131631

0969-8043 (online),   

https://www.sciencedirect.com/science/article/pii/S0969804323002592?via%3Dihub,    https://publications.jrc.ec.europa.eu/repository/handle/JRC131631,   

10.1016/j.apradiso.2023.110906 (online),