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sadetheruiner t1_iu8lvoh wrote

Decades would be an overstatement, nuclear fission was discovered in 1938. Heavy water was only relevant then to slow neutrons. When it first started being produced was 1932. 1934 was the first working reactor. 1939 had the first official document for atomic weapons. Put your decades in a sack.

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InfiniteMothman t1_iuad5f4 wrote

Wasn't what I meant. Didn't mean weapons research. Just the concepts of research into the atomic nucleus, first modernish theories of the nucleus etc.

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