1944: Developing the Bomb

1944: Developing the Bomb

Timeline Image: 
B Reactor Workers

1944 Mar

Emilio Segre has improved his spontaneous fission estimates in cyclotron plutonium (essentially pure Pu-239) to 11 fissions/kg-sec. This is still acceptable for gun assembly, but greatly narrows the margin of security.

1944 Feb

The Los Alamos Governing Board reevaluates deuterium fusion research and determines that tritium would be necessary to make an explosive reaction. Priority of fusion bomb work is further downgraded.

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