Summary
QUESTION We are told that nuclear fallout lasts thousands of years, so how did Hiroshima and Nagasaki recover so quickly?
ATOM bombs produce two types of radiation: initial and residual. Initial or prompt nuclear radiation is that ionising radiation emitted within the first minute after detonation and results almost entirely from the nuclear processes occurring at detonation.See the full content of this document
Extract
Hiroshima's Legacy ; Answers to Correpsondents
Residual radiation is defined as that radiation which is emitted later than one minute after detonation and arises principally from the decay of radioisotopes produced during the explosion.
It is these radioactive isotopes - either generated by the explosion or else induced in soil, building materials, bodies, etc....See the full content of this document
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