Nuclear Physics

Solving the Neutron Diffusion Equation and Calculating the Critical Mass of Uranium

The solution to the partial differential equation that gave the Allies the first atomic bomb in WWII.

Dan Jackson
Cantor’s Paradise
11 min readMay 26, 2023

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This article is the third of a series on the maths and physics behind the development of nuclear weapons in WWII. For more of an introduction and some historical context, I encourage you to check out the first article of the series:

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Physics PhD student and early researcher in quantum optics and cold-matter physics.