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Bethe–Feynman formula
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Bethe–Feynman formula : ウィキペディア英語版
Bethe–Feynman formula
The Bethe-Feynman efficiency formula, a simple method for calculating the yield of a fission bomb,〔http://nuclearweaponarchive.org/Nwfaq/Nfaq4-1.html〕 was first derived in 1943 after development in 1942. Aspects of the formula are speculated to be secret restricted data.〔(Meeting and working with Richard Feynman at Los Alamos ), Web of Stories, story by Hans Bethe recorded in December 1996, last accessed 2015/04/20.〕
==Related formula==

*a = internal energy per gram
*b = growth rate
*c = sphere radius
a \approx (bc)^2 f
A numerical coefficient would then be included to create the Bethe–Feynman formula—increasing accuracy more than an order of magnitude.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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