<prompt> Ka morago ga ntwa, Leona Marshall o ile a boela Yunibesithing ya Chicago, moo a ilego a ba modirišani ka Fermis Institute for Nuclear Studies. Ka go šoma le Chicago Pile 3 heavy water reactor, o ile a hwetša tsela ya go 100 lekgolong ya spin polarize neutron beams, gomme a hlaola refractive index ya neutrons bakeng sa ditlabakelo tše di fapafapanego. Ngwana wa gagwe wa bobedi, John Marshall III, o belegwe ka 1949. O ile a ba moprofesara wa mothuši ka 1953. Ka morago ga lehu la Fermi ka 1954, Marshalls ba arogana. John Marshall o ile a boela Los Alamos Laboratory, mola Leona, bjale e le mma yo a se nago molekane, a ba modirišani ka Institute for Advanced Study ka Princeton, New Jersey ka 1957. Ngwaga wo o latelago o ile a ba modirišani ka Brookhaven National Laboratory, ka nako ya ge nyakišišo ya fisikisi e be e le go tsepelela kgole le nyutlelease ya nyutleleara le dikarolwana tša motheo. Ka 1960, o ile a tsenela Yunibesithi ya Chicago bjalo ka moprofesara wa phenkgi  <response>: John Marshall III 