I work at radiological repair facility in WA. Today a worker went through a radiation detector (GEM-5N) upon exiting a work area and alarmed it. We found this crap underneath the liner in his shoes;
http://ift.tt/2bYSSij
It seems his wife is rather wooful and thought they would be good for him. He also had one in his cell phone.
After trying to determine why his shoes were twice the limit for loose surface a technician found the small rubberish liner and measured it to show over 20,000 pico-curies of some beta emitter and nearly as much alpha radiation. I was not able to measure any gamma, so I figured it was a heavier element. An isotopic analysis revealed Ac-227, half-life 27 years.
http://ift.tt/29IC433
As far as I know (I didn't bother to calculate it) the mass of the isotope in a sample that is only 20,000 pCi is very small; maybe not enough to be of any health concern. But why do this kind of crap? The activity was able to leak out of the liner and into the shoe; but did not get on the person's sock in this case.
http://ift.tt/2bYSSij
It seems his wife is rather wooful and thought they would be good for him. He also had one in his cell phone.
After trying to determine why his shoes were twice the limit for loose surface a technician found the small rubberish liner and measured it to show over 20,000 pico-curies of some beta emitter and nearly as much alpha radiation. I was not able to measure any gamma, so I figured it was a heavier element. An isotopic analysis revealed Ac-227, half-life 27 years.
http://ift.tt/29IC433
Quote:
|
227Ac is highly radioactive and experiments with it are carried out in a specially designed laboratory equipped with a glove box. When actinium trichloride is administered intravenously to rats, about 33% of actinium is deposited into the bones and 50% into the liver. Its toxicity is comparable to, but slightly lower than that of americium and plutonium |
via International Skeptics Forum http://ift.tt/2bMVW66
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