Research on α-Induced Radioluminescence Detection Technology Based on UVC Solar-Blind Ultraviolet Photodetectors

In order to address the issue of limited detection range in traditional <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</tex> radiation detectors, a detection system based on the UVtron R13192 flame detector and a custom-designed driving circuit was developed. Signal checking, pulse characteristic testing, background testing, and radioactive source measurements were performed. The experimental results were compared with the findings of Crompton et al., and the activity response curves of our designed detection system were observed. It was found that both detector systems responded to Ultraviolet C (UVC) photons. Through calculations, the upper count rate of our designed detection system was found to reach ~9000 cps. The background count level of the detector system fluctuated significantly under ambient light conditions, but remained relatively stable under indoor fluorescent lighting conditions. For the radioactive sources, both detector systems showed significant differences in count rates compared to their respective backgrounds (R9533 probe + C10807 driving circuit: P<0.0001; R13192 + custom driving circuit: P<0.05). A fitting of the activity response curve for our designed driving circuit was performed, and the reasons for the large measurement error at distances less than 2 cm were analyzed. The minimum significant activity (MSA) and minimum detectable activity (MDA) were calculated for different distances.