The effect of temperature on g-effective values of soda-lime samples irradiated at different doses

Abstract

Electron spin resonance (ESR) dosimetry aims to investigate different materials for the purpose of reconstruction of the dose absorbed by the victims of radiological and nuclear accidents. The soda-lime glass is very popular as retrospective dosimeter due its availability. In the dose range below 2 Gy soda-lime glass ESR signal of radiation induced radicals overlaps with the background ESR signal and limit the dose reconstruction. Recently it was shown that the behavior of g-effective value is useful tool for dose reconstruction for triage application. Therefore, in this research, effects of temperature on the time stability of the g-effective values, the temperature dependence of the g-effective values and on the previously proposed g-effective approach were studied. The time stability was tested for the temperatures 200 K and 300 K. The g-effective values remained unchanged at both sample temperatures within 2 months after irradiation.The temperature dependence of the g-effective values was investigated in the range from 180 K to 300 K for the samples irradiated with doses 0.3, 0.5, 0.7, 1, 2 and 5 Gy. The results show that temperature of the sample is not influencing the g-effective value. Furthermore, all of the samples exhibit previously proven approach for the g-effective value exponential dependence on the dose. The temperature dependence of the approach was investigated within temperature range from 200 K to 300 K and the results are consistent with previous research. This proves that g – effective value is stable parameter with temperature and within 2 months after irradiation and therefore useful for application in retrospective dosimetry.