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Post by samchiu2000 on May 8, 2017 15:10:21 GMT
Well just a "simple" question: if spreaded evenly on earth surface (510000000km^2), how much cobalt 60 is needed to kill all human outside the shelters on the surface of earth? Ask this question because i am thinking about the background of a mod~
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Post by The Astronomer on May 8, 2017 15:12:45 GMT
It's hard to answer. It actually depends more on how long you're exposed to it.
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Post by samchiu2000 on May 8, 2017 15:14:11 GMT
It's hard to answer. It actually depends more on how long you're exposed to it. What about 10.5 years, 2 half-life of the CO-60? I know it's not easy, so I try to get the answer hereĀ
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Post by matterbeam on May 8, 2017 16:34:46 GMT
We will need more details. Does it fall from the sky? It is directly deposited on the ground? Is it the result of billions of dirty bombs?
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Post by Enderminion on May 8, 2017 17:26:58 GMT
We will need more details. Does it fall from the sky? It is directly deposited on the ground? Is it the result of billions of dirty bombs? salted bombs, Dr Strangelove esqs
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Post by samchiu2000 on May 8, 2017 22:56:34 GMT
We will need more details. Does it fall from the sky? It is directly deposited on the ground? Is it the result of billions of dirty bombs? It fall from sky, and yes it is caused by cobalt bombs~
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Post by samchiu2000 on May 10, 2017 8:19:43 GMT
...so no one want to try it out? I really want the answer so PLEASE...
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Post by The Astronomer on May 10, 2017 8:24:06 GMT
Sorry, but I'm not an expert nor equipped with any motivation drive...
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Post by samchiu2000 on May 10, 2017 8:29:38 GMT
Sorry, but I'm not an expert nor equipped with any motivation drive... That's OK, after all it's all up to you guys, and that why I please you...
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Post by nerd1000 on May 10, 2017 8:59:04 GMT
I suggest you read the novel On the Beach by Nevil Shute. Not a scientific treatment of the topic, but an excellent treatment of hopelessness and misery in the aftermath of global nuclear war with salted weapons.
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Post by samchiu2000 on May 10, 2017 9:32:13 GMT
I suggest you read the novel On the Beach by Nevil Shute. Not a scientific treatment of the topic, but an excellent treatment of hopelessness and misery in the aftermath of global nuclear war with salted weapons. Thx, but i just want to see how many cobalt bomb s are enough to kill most if not all of human because i really want my mod's background as realistic as possible.
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Post by samchiu2000 on May 10, 2017 11:35:52 GMT
What if a ask the question in another way? How many Bq per square km is intense enough to kill a person? (Given that 1 gram of Co-60 will release 44000 GBq in one half life)
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Post by The Astronomer on May 10, 2017 11:50:52 GMT
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Post by samchiu2000 on May 10, 2017 11:55:15 GMT
I am sure that i google something like this for hours...
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Post by thorneel on May 10, 2017 15:23:13 GMT
How many bombs you need seems to be a pretty complex problem, actually.
According to https ://en. wikipedia. org/wiki/Cobalt_bomb "Theoretically, a device containing 510 tons of Co-60 can spread 1 g of the material to each square km of the Earth's surface (510,000,000 km2). Radiation output from 1 g of Co-60 over one half life is equivalent to 44,000 GBq, which is sufficient to kill any inhabitants. If one assumes that all of the material is converted to Co-60 at 100 percent efficiency and if it is spread evenly across the Earth's surface, it is possible for a single bomb to kill every person on Earth. However, in fact, complete 100% conversion into Co-60 is unlikely, as 1957 British experiment at Maralinga showed that Co-59's neutron absorption ability was much lower than predicted, resulting in a very limited formation of Co-60 isotope in practice."
So you would neeed 510 tons of Co60 equally dispersed on the entire surface. You would actually need more cobalt than that as not all of it would be transmuted. Someone may find better sources on the "how much", but I would guess there were not enough tests to give a really precise answer (and if there were, it would be classified). And then there is the problem of dispersing fallout. Counter-intuitively, ground bursts seem to cause more fallout in classical nukes, though long-duration cobalt may still find its way back from atmosphere in airburst as well after a time. Multiple small bombs may be more efficient to disperse fallout on a larger area, but covering the entire planet seems difficult. Maybe there is also a "Project Pluto" version possible, with cruise missiles with open-core nuclear jets leaving a trail of Co60 (and varied other fallout) behind on their wake. If you find alternate ways to seed the atmosphere (say, dropping it from space), you also have to take air currents into account. Maybe also sea currents. Do you want to seed the oceans as well? Is there a soluble cobalt compound? Is there one that would go through the entire water cycle so it can rain back on continents?
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