Bayan da harin a kan Pearl Harbor ya kawo Amurka a cikin yaki, Feynman aka dauka da Robert R. Wilson, wanda aka aiki a kan wajen samar da enriched uranium don amfani a cikin wani bam din nukiliya, a matsayin wani ɓangare na abin da zai zama Manhattan Project. Wilson ta tawagar a Princeton aka aiki a kan wani na'urar da ake kira isotron, da nufin electromagnetically raba uranium-235 daga uranium-238. Wannan da aka yi a cikin wani quite daban-daban hanya daga abin da ake amfani da calutron da aka karkashin ci gaba da wata tawagar a karkashin Wilson ta tsohon malami, Ernest O. Lawrence, a Radiation Laboratory na California.
tsara hanyoyin tsaro don adana kayan aiki