In June 1940, McMillan and Abelson presented definite proof that element 93 had been found in uranium penetrated by neutrons during deuteron bombardment in the cyclotron at the University of California Radiation Laboratory.
"A Brief History of Element Discovery, Synthesis, and Analysis"
Glen W. Watson
Balancing these babies so that they work properly is hard enough for a deuteron accelerator, but the Monster here is ten times as touchy.
"Psichopath"
Gordon Randall Garrett