Abstract
Isotopic ratios of 81Kr/Kr in the range of 10−13 were measured with accelerator mass spectrometry in pre-nuclear atmospheric krypton and in modern krypton. Within the experimental uncertainty (±30%) the 81Kr/Kr ratios were found to be the same. This establishes 81Kr (t1/2 = 230000 years) as a long-lived cosmogenic radionuclide essentially unaffected by anthropogenic contributions, and therefore well suited for dating applications. The anthropogenic “cleanliness” of 81Kr is in accord with estimates for contributions from various human activities.
Original language | English |
---|---|
Pages (from-to) | 13-20 |
Number of pages | 8 |
Journal | Radiochimica Acta |
Volume | 85 |
Issue number | 1-2 |
DOIs | |
State | Published - 1999 |
Keywords
- Kr
- Accelerator mass spectrometry
- Cosmogenic radionuclide
- Groundwater dating