321–330 of 357 posts
Radiation detection is my specialty. This source is Cs-137, few hundred mCi. It's easy to detect within a few seconds at distances of a few tens of meters or more with professional detection equipment if there is direct line of sight. If it was knocked off the road, though, the question will be if it fell into a crack or other such place because then the radiation is somewhat shielded and it would take much more meas…
Radiation detection is my specialty. This source is Cs-137, few hundred mCi. It's easy to detect within a few seconds at distances of a few tens of meters or more with professional detection equipment if there is direct line of sight. If it was knocked off the road, though, the question will be if it fell into a crack or other such place because then the radiation is somewhat shielded and it would take much more meas…
How long till it decays to reasonable safe levels ?
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What literature would you recommend to better understand these procedures?
If you're interested: Guidelines for radioelement mapping using gamma ray spectrometry data International Atomic Energy Agency (2003) https://www-pub.iaea.org/mtcd/publications/pdf/te_1363_web.p... Or go full Aussie, Aussie, Oy, Oy, Oy https://www.ga.gov.au/scientific-topics/disciplines/geophysi... and read the three publications linked at bottom and get the high res A0 wall map for the dorm room ! ( A GUIDE TO THE T…
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Or in a wall of a building: https://en.wikipedia.org/wiki/Kramatorsk_radiological_accide...
Thats a horror story, but the actual horror is society picking not up on this until its too late for alot of lifes. This is one of the incidents, that a centralized health system with data mining could have picked up easily.
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Or months if your family/the doctors prolong your suffering. https://en.wikipedia.org/wiki/Tokaimura_nuclear_accidents#Im...
The family was just clueless and it would have been the job of the doctors to tell them the truth. But they wanted to use the rare case for some scientific glory.
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That's why it's still lost. Cs-137 has a clear gamma emmision spectrum (which is to say it glows a unique color of high-energy photons), so you can scan and pick it up with a scintillation detector. Unfortunately, Cs-137 is one of the bits of waste generated as fallout from nuclear testing, and its half-life is 30 years, so ambient levels are generally not identically zero.
And South Australia (pretty close to the bidder is Western Australia) has seen nuclear testing at woomera missile range so it's pretty likely to have some contamination indeed.
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If you're interested: Guidelines for radioelement mapping using gamma ray spectrometry data International Atomic Energy Agency (2003) https://www-pub.iaea.org/mtcd/publications/pdf/te_1363_web.p... Or go full Aussie, Aussie, Oy, Oy, Oy https://www.ga.gov.au/scientific-topics/disciplines/geophysi... and read the three publications linked at bottom and get the high res A0 wall map for the dorm room ! ( A GUIDE TO THE T…
THANKS!
If you read all that and still feel game for more there's some mad bastard willing to tolerate PhD candidates that want to mix geology and big radiometric data, he even reckons (and I quote):
The integration of these different lines of research has the potential to improve greatly our ability to extract geological information from radiometric datasets for exploration purposes.
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Yes, I recommend mine ;) ... the "Better Geiger S-1" In the budget price range (~$150 and under) my detector, which uses a solid scintillator, and a traditional Geiger tube based device are really the only options worth considering. The pros of my detector are high range (max 20 mSv/hr vs typically 1 mSv/hr for common Geiger tubes), roughly 3x higher X-ray/gamma sensitivity, and automatic energy-correction of dose ra…
Do you have any partner company in Europe that would help with reducing shipping costs for individuals?
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300 Ci is 11 TBq (terabecquerel), or 11·10^12 decays per second. Co-60 has a half life of 166 million seconds, so it was 11·166·10^18/ln 2 atoms=2.6·10^21 atoms, which is 0.004 moles (a mole is 6.02·10^23 atoms). A mole of cobalt 60 weighs 60 g, so it was a quarter of a gram if I did the calculations right. The ln 2 factor is because the probability of a decay happening in a second is ln 2 divided by the half life.
> 166 million seconds Or 5,2 years
Radiation detection is my specialty. This source is Cs-137, few hundred mCi. It's easy to detect within a few seconds at distances of a few tens of meters or more with professional detection equipment if there is direct line of sight. If it was knocked off the road, though, the question will be if it fell into a crack or other such place because then the radiation is somewhat shielded and it would take much more meas…
The biggest problem is going to be if it got embedded in a tire. The hope is that it’s “just on the side of the road”. But there’s a very real possibility that this could get picked up by someone’s car, wedged into the tire tread, and sit in their garage slowly exposing them and/or their family if the garage is used for anything else. Or any other car related exposure scenarios such as part time rideshare driver or w…