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Unformatted text preview: Heisenberg's work, in the meantime, focused largely on nuclear decay, along the lines of the research Enrico Fermi had started. Heisenberg proposed the revolutionary &quot;shower theory&quot; to describe cosmic radiation as explosion-like. When Heisenberg brought this theory to the United States, his audience dwelled more on the question of why he had chosen to remain in Germany than on his work in shower theory. Perhaps implicitly, audiences recoiled from accepting his work because German physics was on the decline, while American research was on the rise. War broke out in Europe on September 1, 1939. Heisenberg was fully prepared to serve his country, and he expected orders to report to the front. But the army had better use for its leading physicists: Heisenberg and several of his experimentalist colleagues were organized into a &quot;uranium club&quot; that would begin the investigation of nuclear fission and...
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- Fall '08