In order to assess the radioactive level in the environment, the specific activities of 238 U, 232 Th and 40 K were measured by using a gamma ray spectrometer based on a NaI(Tl) detector. The results showed that the specific activities of 238 U, 232 Th and 40 K were 12.846-88.585, 1.304-26.656 and 11.598-2275.896
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.