<prompt> Ngemva kwempi, uLeona Marshall wabuyela eNyuvesi yaseChicago, lapho waba khona umsizi eFermis Institute for Nuclear Studies. Ngo-1960, wajoyina i-Chicago Pile 3 heavy water reactor, wathola indlela yokwenza i-100 spin polarize neutron beams, futhi wanquma i-refractive index yama-neutron ngezinto ezahlukahlukene. Ingane yakhe yesibili, uJohn Marshall III, yazalwa ngo-1949. Waba nguprofesa osizayo ngo-1953. Ngemuva kokushona kukaFermi ngo-1954, abakwaMarshall bahlukana. UJohn Marshall wabuyela eLebhu yaseLos Alamos, kanti uLeona, manje ongumama ongashadile, waba ngumsizi e-Institute for Advanced Study ePrinceton, eNew Jersey ngo-1957.  <response>: UJohn Marshall III 