Ka dibna ka jawaab su'aasha ka dib luqadda la mid ah sida marinka: Marinka: Iyada oo horumarinta xawaaraha qayb ka mid ah inta lagu guda jiro qeybtii hore ee qarnigii labaatanaad, physicists bilaabeen inay qoto dheer u qodo sifooyinka qayb ka mid ah subatomic. Isku daygii ugu horeeyay ee guul leh si loo dedejiyo electrons isticmaalaya induction electromagnetic la sameeyey 1942 by Donald Kerst.
2.3 MeV