Used with
permission of Maiken Naylor, University at Buffalo, Buffalo, NY, USA,
http://ublib.buffalo.edu/libraries/units/sel/exhibits/stamps
Irene (1897-1956) and Frederic Joliot-Curie (1900-1958), daughter and son-in-law of the Curies, continued the study of radioactivity, producing artificial radioisotopes by alpha bombardment of aluminum and other light nuclei, and also shared a Nobel Prize in chemistry for this work. Frederic continued research on uranium fission and the accompanying production of neutrons. He became the leader of the French atomic energy program. After World War II, he had a deep concern for world peace, becoming the first president of the World Council for Peace.