Franz N. D. Kurie

Franz Newell Devereux Kurie (February 6, 1907 in Victor, Colorado – June 12, 1972) was an American physicist who, while working at Yale in 1933, showed that the neutron was neither a dumbbell-shaped combination of proton and electron, nor an onion-shaped combination of an electron embracing the proton. Consequently, and until the discovery of the quark structure of hadrons, the neutron was assumed to be an elementary particle.