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jun 15, 1940 - Using the Berkeley cyclotron, Philip Abelson and Edwin McMillan demonstrate that neutrons captured by uranium 238 lead to the creation of elements 93 and 94, neptunium and plutonium.

Added to timeline:

Atomic Bomb Timeline

ByAlec
14 Mar 2020

Date:

jun 15, 1940
Now
~ 83 years ago
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