<prompt> Bhala okuqhubekayo kwalesi sigaba - NgoFebhuwari 1945, iqembu elincane lososayensi lase liphumelele ekukhiqizeni inani elincane lezinto ezibonakalayo esihlukanisweni esiyisisekelo endaweni ye-RIKEN. Izinto ezibonakalayo i-cyclotron ye-RIKEN eyabonisa ukuthi ayisiyo i-uranium-235.  <response>: . futhi. Akukho mzamo owenziwa wokwakha inqwaba ye-uranium; amanzi asindayo ayengatholakali, kodwa uTakeuchi Masa, owayephethe isihlukanisi sikaNishina, wabala ukuthi amanzi alula ayezokwanela uma i-uranium ingacebiselwa ku-510 uranium-235. 