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this post was submitted on 31 Aug 2025
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A human body blocks more than several inches of lead? I need to rethink the design of my bunker.
Doing some quick math and numbers pulled from wikipedia, Lead is about 14-15x as effective by volume compared to water at blocking gamma radiation.
I think far more significant in saving the other scientists was the inverse square law. The radiation energy falls off with the square of distance, so Slotin would have received a significantly higher dose just from being right next to it.