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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Poster
HK 23.1: Poster
Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik
The effects of gamma irradiation on some properties of CR-39 detectors — •Kahalil Thabayneh1 and Marwa Shoeib2 for the PANDA collaboration — 1Hebron University, Hebron, Palestinian Occupied Territories — 2Hebron University, Hebron, Palestinian Occupied Territories
In this study, the bulk etch rate, bulk activation energy, track density, and the degree of crystallinity percentage were analyzed for CR-39 samples irradiated with γ-rays from a 60Co source at doses ranging from 0 to 200 kGy. After irradiation, the samples were exposed to zirconium sand to collect α-particle tracks. The samples were then etched in a 6.25 N NaOH solution for 4 hours at temperatures of 60, 65, 70, 75, and 80°C. The results showed that the bulk etch rate increased with higher γ- doses at all etching temperatures. Additionally, both the bulk activation energy and track density decreased as the γ- dose increased. The degree of crystallinity was also examined for both etched and unetched samples at various γ doses. The observed increase in bulk etch rate, alongside the decrease in both bulk activation energy and track density with rising γ- doses, is attributed to the degradation of the CR-39 polymeric material.
Keywords: gamma irradiation; CR-39; doses; Tracks; bulk etch