Temperature effects on the ethanol-chlorobenzene dosimeter (Dvornik dosimeter)

The effects of elevated temperatures (50 and 80oC) on the dose dependence of the response of the ethanol-chlorobenzene (ECB) dosimeter, namely G(Cl-) values as a function of dose, were studied in the dose range 1-25 kGy. Systems containing 4, 10 and 20 vol% CB showed no dose effects of the response at 50oC and system containing 4 vol% CB showed no dose effect of G(Cl-) at 80oC, when compared with the radiation chemical yield measured for irradiations at room temperature (20oC). Dose dependence of G(Cl-) values in other systems at elevated temperatures were qualitatively similar to those at room temperature; the main difference, however, was that the values of G(Cl-) at elevated temperatures were higher. Larger temperature effects were observed at higher temperatures, higher CB concentrations and lower doses. Correct dosimetry is nevertheless possible with any formulation of the system at any dose or temperature within the studied interval by taking appropriate values of the response, either directly or by interpolation. (author)