Speaker
Description
The radioxenon stations of the International Monitoring System (IMS) extract xenon from the atmosphere, focusing on the four primary radioxenons and radon's daughter products, $^{214}$Pb and $^{214}$Bi, in their activity concentration calculations. However, $^{125}$Xe, which is both an air activation and fission product, may become more prevalent with the next generation of radioxenon systems coming online soon. Xe-125 decays to $^{125}$I, a long-lived isotope that cannot be easily removed from the beta detector. Additionally, the radon decay chain extends beyond $^{214}$Pb and $^{214}$Bi. Over time, sufficient $^{210}$Pb can accumulate on the detector, becoming detectable in sample files and gas backgrounds. Furthermore, $^{210}$Bi, with a half-life of 5 days, can also contribute to additional background interference. This study looks at possible $^{125}$Xe observations, examines the potential impact of $^{125}$I, $^{210}$Pb, and $^{210}$Bi on radioxenon calculations, and addresses whether new detector backgrounds should be taken periodically to ensure accurate measurements.
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