Comparison of three methods of EPR retrospective dosimetry in watch glass

In this article we present results of our follow-up studies of samples of watch glass obtained and examined within a framework of international intercomparison dosimetry project RENEB ILC 2021. We present three methods of dose reconstruction based on EPR measurements of these samples: calibration method (CM), added dose method (ADM) and added dose&heating method (ADHM). The study showed that the three methods of dose reconstruction gave reliable and similar results in 0.5-6.0 Gy dose range, with accuracy better than 10%. The ADHM is the only one applicable in a real scenario, when sample-specific background spectrum is not available; therefore, a positive verification of this method is important for future use of EPR dosimetry in glass in potential radiation accidents.

Automated summary

This article presents the results of follow-up studies on samples of watch glass within the framework of the international intercomparison dosimetry project RENEB ILC 2021. Three methods of dose reconstruction based on EPR measurements are introduced and their reliability and accuracy are evaluated. The added dose&heating method is found to be the only applicable method in real scenarios, highlighting its importance for potential radiation accidents involving glass.