Word: fissioning
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Dates: during 1960-1969
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...develop "clean" hydrogen bombs with little or no radioactive fall out by improving the efficiency of the fission "trigger" that produces most of the fallout in nuclear explosions...
...consequence of the increased leukemia, bone cancer, genetic abnormalities and other maladies. Such deaths would constitute a minor addition to those now cause by background radiation, but there appears to be a fair consensus among American cancer ticists and others which can be summarized that for every ten fission yield of tests (which be more than ten megatons of power) an estimated 100,00 sons now living would have the shortened and another 100,000 yet to be born would be . Much of the evidence this statement is collected two volume 1957 hearings on Nature of Radioactive Fall-Our Effect...
...their fission triggers for thermonuclear weapons, the Russians approached the theoretical maximum efficiency-something the U.S. has not got near. With such efficiency, they were able to eliminate most of the fallout from the fission process and make their bombs remarkably clean. U.S. scientists had expected the Soviet triggers to account for up to 50% of the yield; they actually accounted for less than...
...their nuclear weapons. The tests opened the way for the Russians to develop nuclear warheads for their missiles that will be much more powerful than the warhead on the Titan II, the biggest U.S. missile, which has a punch of less than 10 megatons. The Russians also developed fission triggers for their H-bombs superior to American models, and worked on an anti-missile rocket...
...There was strong evidence that the Russians have developed an improved fission triggering device that greatly reduces the amount of radioactive fallout. Part of this new "cleanliness" might be attributed to high-altitude bursts, which do not suck up dust-but there was every reason to believe that the U.S.S.R. has made great strides in sophisticating its atomic art to a point almost equal to that...