Emilio G. Segr%C3%A8
Emilio Gino Segr was an Italian physicist and Nobel laureate who discovered the elements technetium and astatine, and the antiproton, a subatomic antiparticle, for which he was awarded the Nobel Prize in Physics in 1959. From 1943 to 1946 he worked at the Los Alamos National Laboratory as a group leader for the Manhattan Project. He found in April 1944 that Thin Man, the proposed plutonium guntype nuclear weapon would not work because of the presence of plutonium240 impurities.
Emilio Gino Segr was born into a Sephardic Jewish family in Tivoli, near Rome, onFebruary 1905, the son of Giuseppe Segr, a businessman who owned a paper mill, and Amelia Susanna Treves. He had two older brothers, Angelo and Marco. His uncle, Gino Segr, was a law professor. He was educated at the ginnasio in Tivoli, and, after the family moved to Rome in 1917, the ginnasio and liceo in Rome. He graduated in July 1922, and enrolled in the University of Rome La Sapienza as an engineering student.
Source: Wikipedia