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Harrison Scott Brown (September 26, 1917 – December 8, 1986) was an American nuclear chemist and geochemist. He was a political activist, who lectured and wrote on the issues of arms limitation, natural resources and world hunger. During World War II, Brown worked at the Manhattan Project's Metallurgical Laboratory and Clinton Engineer Works, where he worked on ways to separate plutonium from uranium. The techniques he helped develop were used at the Hanford Site to produce the plutonium used in the Fat Man bomb dropped on Nagasaki. After the war he lectured on the dangers of nuclear weapons. After the war, he worked at the University of Chicago, where he pioneered nuclear geochemistry. The study of meteorites by Brown and his students led to the first close approximation of the age of the Earth and the solar system. Between 1951 and 1977, he worked at the California Institute of Technology (Caltech) where he contributed to advancements in telescopic instrumentation, jet propulsion, and infrared astronomy. ==Early life== Harrison Scott Brown was born in Sheridan, Wyoming, on September 26, 1917, the son of a rancher and cattle broker, Harrison H. Brown (1880-1927), and his wife Agnes Anna (Scott) Brown (1889-1963), a piano teacher from Dubuque, IA. His father died when he was just ten years old and the family moved to San Francisco, where his mother worked as a dental assistant, and played the piano for silent movie theaters. He learned to play piano and formed a jazz band, but never learned how to read music notation. He attended Galileo High School, and entered the University of California, Berkeley, where he earned a bachelor of science (B.S.) degree in chemistry in 1938. He married Adele Scrimger, with whom he had a son, Eric Scott Brown. While at Berkeley, Brown had become interested in nuclear chemistry. He moved to Johns Hopkins University in Baltimore, Maryland, where he studied for his doctorate under the supervision of Robert D. Fowler,〔 who had been a chemistry professor at Berkeley from 1930 to 1936. For his doctorate, Brown constructed a mass spectroscope. Following the discovery of nuclear fission by Lise Meitner and Otto Hahn in 1939, there arose considerable interest in . Brown and Fowler studied the properties of uranium hexafluoride, which they were soon supplying to Columbia University and the University of Chicago, where research was being conducted into isotope separation for what would become the Manhattan Project.〔 In 1941 he was awarded his doctor of philosophy (Ph.D.) by Johns Hopkins University, writing his thesis in two topics that would be of great interest to the Manhattan Project :the construction of a mass spectrometer for isotope analysis, and the thermal diffusion of argon. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Harrison Brown」の詳細全文を読む スポンサード リンク
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