Sources??
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I suspect the latest in WW2 shipwreck theft is probably going to the low background steel market, or people are committing sea wargrave desecration for scrap value.
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Very interesting if true. What is the Delta between the pre & post Trinity test measurements (on average)?
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I've wondered if the recent demolition of half of the San Francisco-Oakland Bay Bridge, built 1933-1936, has saturated the market for low-background steel.
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Probably cheaper than using Scapa Flow steel from WW1 High Seas Fleet scuttling
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You ought to make clear that the increase is from weapons and atmospheric bomb testing. What are the main trace isotopes in today’s steel ?
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Also for naturally acquired radioactivity. Lead mined today is useless for shielding sensitive detectors, but lead mined 2000y ago & stored under 50m of water is acceptable. Thus CERN has a budget for archaeologists to excavate Roman wrecks from the seabed.
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Wow amazing facts that I had no idea about.
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