Back to Search
Start Over
A record of fallout 239Pu and 240Pu at World Heritage Bathurst Harbour, Tasmania, Australia.
- Source :
-
Journal of Environmental Radioactivity . Oct2021, Vol. 237, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- This study presents the first measurements of anthropogenic plutonium (239Pu and 240Pu) concentrations and atom ratios (240Pu/239Pu) for Tasmania, in sediment collected from Bathurst Harbour, in the Tasmanian Wilderness World Heritage Area, Australia. The weighted mean 240Pu/239Pu atom ratio measured at this site was 0.172 ± 0.007 which is consistent with published data from mainland Australia and global and Southern Hemisphere averages. The 240Pu/239Pu atom ratios ranged between 0.11 and 0.21 with the earliest recorded 240Pu/239Pu atom ratios being the lowest, suggesting an influence of low atom ratio fallout from nuclear testing in Australia. Post-moratorium fallout 240Pu/239Pu atom ratios were consistent with other records. Lead-210 (210Pb) sediment chronologies indicate sediment accumulation rates have increased since the early part of the 19th century at this location. [Display omitted] • Presents the first measurements of fallout plutonium concentrations and 240Pu/239Pu atom ratios in Tasmania, Australia. • Uses an estuarine sediment record from a World Heritage Area to reconstruct fallout from global nuclear weapons testing. • Early 240Pu/239Pu atom ratios indicate contribution of fallout from British testing in Australia. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0265931X
- Volume :
- 237
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Radioactivity
- Publication Type :
- Academic Journal
- Accession number :
- 152252051
- Full Text :
- https://doi.org/10.1016/j.jenvrad.2021.106679