Nuclear weapons produced ²³⁶U, ²³⁹Pu and ²⁴⁰Pu archived in a Porites Lutea coral from Enewetak Atoll

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dc.contributor.authorFroehlich, Michaela
dc.contributor.authorTims, Stephen
dc.contributor.authorFallon, Stewart
dc.contributor.authorWallner, Anton
dc.contributor.authorFifield, L Keith
dc.date.accessioned2020-01-17T02:54:56Z
dc.date.issued2017
dc.date.updated2019-11-25T07:22:15Z
dc.description.abstractA slice from a Porites Lutea coral core collected inside the Enewetak Atoll lagoon, within 15 km of all major nuclear tests conducted at the atoll, was analysed for 236U, 239Pu and 240Pu over the time interval 1952-1964 using a higher time resolution than previously reported for a parallel slice from the same core. In addition two sediment samples from the Koa and Oak craters were analysed. The strong peaks in the concentrations of 236U and 239Pu in the testing years are confirmed to be considerably wider than the flushing time of the lagoon. This is likely due to the growth mechanism of the coral. Following the last test in 1958 atom concentrations of both 236U and 239Pu decreased from their peak values by more than 95% and showed a seasonal signal thereafter. Between 1959 and 1964 the weighted average of the 240Pu/239Pu atom ratio is 0.124 ± 0.008 which is similar to that in the lagoon sediments (0.129 ± 0.006) but quite distinct from the global fallout value of ∼0.18. This, and the high 239,240Pu and 236U concentrations in the sediments, provides clear evidence that the post-testing signal in the coral is dominated by remobilisation of the isotopes from the lagoon sediments rather than from global fallout
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0265-931Xen_AU
dc.identifier.urihttp://hdl.handle.net/1885/198348
dc.language.isoen_AUen_AU
dc.publisherElsevieren_AU
dc.rights© 2017 Elsevier Ltden_AU
dc.sourceJournal of Environmental Radioactivityen_AU
dc.titleNuclear weapons produced ²³⁶U, ²³⁹Pu and ²⁴⁰Pu archived in a Porites Lutea coral from Enewetak Atollen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.lastpage353en_AU
local.bibliographicCitation.startpage349en_AU
local.contributor.affiliationFroehlich (previously Srncik) , Michaela, College of Science, ANUen_AU
local.contributor.affiliationTims, Stephen, College of Science, ANUen_AU
local.contributor.affiliationFallon, Stewart, College of Science, ANUen_AU
local.contributor.affiliationWallner, Anton, College of Science, ANUen_AU
local.contributor.affiliationFifield, L Keith, College of Science, ANUen_AU
local.contributor.authoremailu4013304@anu.edu.auen_AU
local.contributor.authoruidFroehlich (previously Srncik) , Michaela, u5217967en_AU
local.contributor.authoruidTims, Stephen, u4013304en_AU
local.contributor.authoruidFallon, Stewart, u9708405en_AU
local.contributor.authoruidWallner, Anton, u5124538en_AU
local.contributor.authoruidFifield, L Keith, u8100341en_AU
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor029904 - Synchrotrons; Accelerators; Instruments and Techniquesen_AU
local.identifier.absfor040203 - Isotope Geochemistryen_AU
local.identifier.absfor030101 - Analytical Spectrometryen_AU
local.identifier.ariespublicationa383154xPUB6172en_AU
local.identifier.citationvolumeArticle In Pressen_AU
local.identifier.doi10.1016/j.jenvrad.2017.05.009en_AU
local.identifier.scopusID2-s2.0-85020094205
local.identifier.thomsonIDMEDLINE:28526526
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttps://www.elsevier.com/en-auen_AU
local.type.statusPublished Versionen_AU

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