The Demon Core: A Screwdriver That Killed Two Scientists
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The Demon Core: A Screwdriver That Killed Two Scientists
The Demon Core was a 6.2 kg sphere of plutonium-239 created during the Manhattan Project. Originally intended for a third atomic bomb to be dropped on Japan after Hiroshima and Nagasaki, it was instead kept for criticality experiments at Los Alamos. In 1945, physicist Harry Daghlian dropped a tungsten carbide brick onto the core, triggering a ...
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The demon core was a small plutonium sphere used in early nuclear research. It stayed close to a chain reaction, so even a tiny change could trigger a burst of radiation. In 1945, Harry Daghlian caused a critical reaction by mistake and died weeks later. In 1946, Louis Slotin repeated a similar test, a tool slipped, and he died within days. After these incidents, scientists stopped manual experiments and introduced strict safety systems. This core showed how fast small errors in nuclear work tur
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