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InspiredIdiot
on Jan 7, 2021
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Nuclear lighthouses built by the Soviets in the Ar...
I've never heard of thorium being used in smoke detectors. As far as I know it is always Americium, including in David Hahn's case.
https://en.wikipedia.org/wiki/Americium-241
at_a_remove
on Jan 8, 2021
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The thorium is in the gas mantles.
cozzyd
on Jan 7, 2021
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well you'll very slowly get some thorium in the decay chain :)
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https://en.wikipedia.org/wiki/Americium-241