Evidence for Bismuth-207 in Global Fallout
Samples of lichen, moss, soil and air collected since 1961 in Greenland, Svalbard, Iceland, the Faroe Islands, Sweden and Denmark have been remeasured for γ-emitting radionuclides by Ge(Li) spectroscopy. The samples have shown the presence of 207Bi (physical half-life 38 years), a nuclide which has...
| Published in: | Journal of Environmental Radioactivity |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1984
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| Subjects: | |
| Online Access: | https://orbit.dtu.dk/en/publications/c88ecabd-029e-4448-b480-abe6c2582a5e https://doi.org/10.1016/0265-931X(84)90002-X |
| Summary: | Samples of lichen, moss, soil and air collected since 1961 in Greenland, Svalbard, Iceland, the Faroe Islands, Sweden and Denmark have been remeasured for γ-emitting radionuclides by Ge(Li) spectroscopy. The samples have shown the presence of 207Bi (physical half-life 38 years), a nuclide which has not been reported earlier in world-wide fallout. The concentrations of 207Bi have been compared with those of 60Co, 125Sb, and 137Cs. From this comparison the production of 207Bi is estimated at 1 PBq. It is assumed that the 207Bi is created in thermonuclear tested explosions in general and that in particular the 55Mt detonation of 30 October 1961 at Novaya Zemlya may have produced this activation product. |
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