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Initial Nuclear Radiation


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Nuclear radiation (essentially neutrons and gamma rays) emitted from the fireball and the cloud column during the first minute after a nuclear (or atomic) explosion. The time limit of one minute is set, somewhat arbitrarily, as that required for the source of part of the radiations (fission products, etc., in the radioactive could) to attain such a height that only insignificant amounts of radiation reach the earth’s surface. (Source: Glasstone, The Effects of Nuclear Weapons, 3rd Ed., 1977, Glossary, p. 635)

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