Formation and geochemical significance of micrometallic aggregates including fissiogenic platinum group elements in the Oklo natural reactor, Gabon

Kikuchi, Makiko; Hidaka, Hiroshi; Gauthier-Lafaye, F.

doi:10.1016/j.gca.2010.06.004

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…The use of the A = 101 isobar in combination with other isotopic markers has been key for developing an understanding of geological transformations and geochemical behaviours of different isotopes and radioisotopes that were formed in the Oklo natural fission reactor in Gabon. For example, one study on the micro-metallic and ε-phase aggregates, including the fission-derived elements Ru, Rh, Pd, Te, Pb, As, S, and Bi, were collected and the isotopic ratios of different isotopic systems, i.e., 235 U/ 238 U, 90 Zr/ 91 Zr, 95 Mo/ 97 Mo, and 99 Ru/ 101 Ru, were analysed 128 . Whereas the 90 Zr/ 91 Zr and 95 Mo/ 97 Mo ratios in the metallic aggregates varied little in composition, likely due to constant separate mixing of fissiogenic and non-fissiogenic components, the 99 Ru/ 101 Ru ratios exhibited large variations, which could not be described by such processes.…”

Section: Applicationsmentioning

confidence: 99%

“…It is suggested that fractionation would have occurred over the timeframe of the t 1/2 of 99g Tc or ~2.11 × 10 5 y, where the leaching behaviour of Tc, said to be 10 3 –10 4 times that of Ru, would have been a strong driver of fractionation between the two elements. Likewise, the chemical fraction of Tc and Ru could have taken place during the incorporation of each into the metallic aggregate 128 . On the other hand, Groopman et al.…”

Section: Applicationsmentioning

confidence: 99%

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Discovery, nuclear properties, synthesis and applications of technetium-101

Johnstone¹,

Mayordomo

Mausolf³

2022

Commun Chem

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Technetium-101 (101Tc) has been poorly studied in comparison with other Tc isotopes, although it was first identified over ~80 years ago shortly after the discovery of the element Tc itself. Its workable half-life and array of production modes, i.e., light/heavy particle reactions, fission, fusion-evaporation, etc., allow it to be produced and isolated using an equally diverse selection of chemical separation pathways. The inherent nuclear properties of 101Tc make it important for research and applications related to radioanalytical tracer studies, as a fission signature, fusion materials, fission reactor fuels, and potentially as a radioisotope for nuclear medicine. In this review, an aggregation of the known literature concerning the chemical, nuclear, and physical properties of 101Tc and some its applications are presented. This work aims at providing an up-to-date and first-of-its-kind overview of 101Tc that could be of importance for further development of the fundamental and applied nuclear and radiochemistry of 101Tc.

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%