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On the presence of ...
On the presence of plutonium in Madagascar following the SNAP-9A satellite failure
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- Rääf, C. (författare)
- Lund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups
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- Holm, Elis (författare)
- University of Gothenburg,Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för radiofysik,Institute of Clinical Sciences, Department of Radiation Physics
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- Rabesiranana, N. (författare)
- Institut National des Sciences et Techniques Nucléaires INSTN-Madagascar
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- Garcia-Tenorio, R. (författare)
- National Center of Accelerators, CNA
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- Chamizo, E. (författare)
- National Center of Accelerators, CNA
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
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Ingår i: Journal of Environmental Radioactivity. - : Elsevier BV. - 0265-931X. ; 177, s. 91-99
- Relaterad länk:
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http://dx.doi.org/10...
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- This study examined the Pu-238 and 239+249PU activity concentration and the Pu-240/Pu-239 atomic ratio in peat bogs sampled in 2012 from marshlands in central Madagascar. The purpose was to investigate the., presence of plutonium isotopes, (238,) (239,) Pu-240, from the 1964 satellite failure carrying a SNAP-9A radiothermal generator. With an average Pu-238/Pu239+240 activity ratio of 0.165 +/- 0.02 (decay corrected to 1964), the peat bogs in Madagascar exhibit similar values as the ones found in the southeastern African continent, except they are one order of magnitude higher than expected (0.025) from global fallout in the Southern Hemisphere. The Pu-240/Pu-239 atomic ratio showed a distinct decrease for layers dating back to the mid-1960s (down to 0.069 compared with an anticipated ratio of 0.17 for global fallout), indicating that the SNAP-9A failure also resulted in an elevated deposition of Pu-239. The obtained results demonstrate that further Pu analysis in Madagascar and in southeastern continental Africa is necessary to fully account for the regional Pu deposition from the SNAP-9A event. (C) 2017 Elsevier Ltd. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- fallout plutonium
- pu-isotopes
- sediments
- cs-137
- Environmental Sciences & Ecology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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