Word: petrzhak
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Dates: during 1950-1959
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...important factor in weighing the feasibility of practical bombmaking. Theorists said that spontaneous fission ought to take place, but excellent experimental men in the U.S. were unable for a considerable time to prove that it did. The first to prove it (in 1940) were two young Russians, Flerov and Petrzhak, who did their work (to protect their experiment from the intrusion of cosmic rays) in the depths of Moscow's ornate subway...
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