How long does radiation last after an atomic bomb?
by 
answer4life
ANSWERS: 7
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That would depend on several variables. What was the fissionable material used to create the explosion. Where was the explosion detonated. What are the weather patterns. Etc.... Are you planning something? Or, do you know something that the rest of us should be aware of? I think we need to speak. The Office of Homeland Security will be very interested in what you know and what you have to say.
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for thousands of years it can still be detected, although we have had the bomb for almost 70years the knowledge gathered could well place the radiation count into the centuries
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Here's a piece of the link: http://www.cbc.ca/health/story/2006/03/01/atomic-thyroid060301.html "The present study revealed that, 55 to 58 years after radiation exposure, a significant relationship existed in the prevalence of not only malignant thyroid tumours but also benign thyroid nodules and that the relationship was significantly higher in those exposed at younger ages," the researchers wrote.
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Hey i am not planning anything. All i do is look up things i feel interested about, ask my teachers, my friends, and get more information. What would i do if there was nothing to fascinate my mind? I got nothing better to do but admire powerful things.
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The "Classic" A-bomb is very dirty, producing several radioactive isotopes, some of which which "decay" into other radioactive isotopes. Then there are secondary radioactive isotopes which are produced when some non-radioactive material is bombarded by neutrons and alpha, beta, and gamma rays from the fission reaction. Strontium-90, which is one of the primary nasties, is easily absorbed by the body in any tissue which uses calcium, such as bones and teeth. Particularly hard on children. This isotope has a half-life of almost 30 years and decays into yet another radioactive isotope so you get a double dose of radiation from each atom you ingest. And that's just one example. Some isotopes will emit various particles for centuries. Bottom line: There are many variables but you can bet on a blast site being radioactive for a long time.
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seeing as how this question has been answered id just like to say... if a plutonium based nuclear weapon was detonated in high earth orbit it would kill all life on the planet and irradiate the earth for millions of years, just incase you were planning something, thats the best way to do it.
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IF A BOMB WENT OFF HOW LONG BEFORE PEOPLE WOULD ABLE TO COME OUT TO START LIFE OVER
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