Excess carbon‐14 abundances in uranium ores: Possible evidence for emission from uranium‐series isotopes | Zendy

Barker D. | Zendy; Jull A. J. T. | Zendy; Donahue D. J. | Zendy

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Excess carbon‐14 abundances in uranium ores: Possible evidence for emission from uranium‐series isotopes

Author(s) -

Barker D.,

Jull A. J. T.,

Donahue D. J.

Publication year - 1985

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl012i010p00737

Subject(s) - uranium , natural uranium , isotope , carbon fibers , uranium 238 , radiochemistry , mineral , isotopes of uranium , decay chain , radioactive decay , nuclear physics , chemistry , physics , neutron , materials science , fission , metallurgy , composite number , composite material

Significant levels of 14 C have been detected in uranium‐bearing minerals using the tandem accelerator mass spectrometer at the University of Arizona. The amount of 14 C detected in a given mineral is proportional to the concentration of uranium in that mineral. The average value of 14 C atoms/uranium atom is (2.2±0.5)×10 −15 (2σ). These data are consistent with the assumption of direct 14 C emission from one or more nuclei in the 238 U decay chain with a branching ratio of 1.0 to 2.0×10 −9 , relative to alpha decay. The uncertainty results from the possible production of 14 C from 11 B(α,p) 14 C.

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