Atomic Heritage Foundation

In partnership with the National Museum of Nuclear Science & History National Museum of Nuclear Science & History

Mid-August 1942

Mid-August 1942

Enrico Fermi's group demonstrates an experimental pile with a projected k value of close to 1.04. Achieving a chain reaction is now certain.

Related Images: 
Artist rendering of the Chicago Pile-1 going critical
Date Range: 
1942CE Aug
Era: 
1941 to 1942: Getting Organized