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240Pu/239Pu
AMS
Activity concentration
Arctic
Atom ratio
1
Biogeochemical cycle
Fallout
1
Ice
Ice core
1
Isotopes
1
Isotopic fingerprinting
1
Keywords: Accelerator mass spectrometry
1
Mass spectrometry
1
Plutonium alloys
1
Troposphere
1
cesium 137
1
plutonium 239
1
plutonium 240
1
ra 236U/239Pu
1
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