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Direct Pb Isotopic Analysis of a Nuclear Fallout Debris Particle from the Trinity Nuclear Test
Swedish Museum of Natural History, Department of Geology.ORCID iD: 0000-0003-3366-2708
Swedish Museum of Natural History, Department of Geology.
Swedish Museum of Natural History, Department of Geology.
2017 (English)In: Analytical Chemistry, ISSN 0003-2700, E-ISSN 1520-6882, Vol. 89, p. 1887-1891Article in journal (Refereed) Published
Abstract [en]

The Pb isotope composition of a nuclear fallout debris particle has been directly measured in post-detonation materials produced during the Trinity nuclear test by a secondary ion mass spectrometry (SIMS) scanning ion image technique (SII). This technique permits the visual assessment of the spatial distribution of Pb and can be used to obtain full Pb isotope compositions in user-defined regions in a 70 μm × 70 μm analytical window. In conjunction with backscattered electron (BSE) and energy-dispersive spectroscopy (EDS) mapping of the same particle, the Pb measured in this fallout particle cannot be from a major phase in the precursor arkosic sand. Similarly, the Pb isotope composition of the particle is resolvable from the surrounding glass at the 2σ uncertainty level (where σ represents the standard deviation). The Pb isotope composition measured in the particle here is in excellent agreement with that inferred from measurements of green and red trinitite, suggesting that these types of particles are responsible for the Pb isotope compositions measured in both trinitite glasses. 

Place, publisher, year, edition, pages
2017. Vol. 89, p. 1887-1891
National Category
Analytical Chemistry
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-2647DOI: 10.1021/acs.analchem.6b04330OAI: oai:DiVA.org:nrm-2647DiVA, id: diva2:1164922
Funder
Swedish Research Council, 2016-03371, 621-2012-4370Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2017-12-12Bibliographically approved

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