### Possible Answer

Bethe–Feynman formula. From Wikipedia, the free encyclopedia. Jump to: navigation, search. The Bethe-Feynman efficiency formula, a simple method for calculating ... - read more

Feynman and the Bomb by Alex Wellerstein, ... Glasstone’s LA-1632 which you’ve uploaded in pdf explains the Bethe-Feynman formula on pp34-36; ... - read more

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