re: Radioactive carjacking in Jackson

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Why is someone carrying this at 3:15 am?

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Source 1 had an activity of 6000.627 mCi

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That's 6 Curies.

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Both of these are linked to the fact that it's an F-18 source. F-18 has a half life of about an hour and a half and decays into stable oxygen. So, they send out a metric frickton of radioactivity out at 3:15AM. At 4:45 AM, it's half a metric frickton. At 6:15 AM, it's a quarter frickton. By the time you dose the first patient at 7:45, there's only a eighth of the original frickton left. By the time the patient has lunch, there's only 3% of the original activity left. By the time the patient has dinner, there's basically no radioactivity left; it's all decayed into oxygen.


Or something like that.