Comparisons between radioactive and non-radioactive gas lantern mantles

@article{Furuta2000ComparisonsBR,
  title={Comparisons between radioactive and non-radioactive gas lantern mantles},
  author={Etsuko Furuta and Yukio Yoshizawa and Tamaru Aburai},
  journal={Journal of Radiological Protection},
  year={2000},
  volume={20},
  pages={423 - 431}
}
Gas lantern mantles containing radioactive thorium have been used for more than 100 years. Although thorium was once believed to be indispensable for giving a bright light, non-radioactive mantles are now available. From the radioactivities of the daughter nuclides, we estimated the levels of radioactivity of 232Th and 228Th in 11 mantles. The mantles contained various levels of radioactivity from background levels to 1410±140 Bq. Our finding that radioactive and non-radioactive mantles are… 

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