Physics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978georl...5.1079k&link_type=abstract
Geophysical Research Letters, vol. 5, Dec. 1978, p. 1079-1082.
Physics
46
Iron Meteorites, Meteoritic Composition, Palladium, Radioactive Age Determination, Solar System, Abundance, Aluminum 26, Chronometers, Nuclear Fusion, Radioactive Decay, Radioactive Isotopes, Silver Isotopes, Concentrations, Isotopic Ratios, Melting, Composition, Nucleosyntheses, Iron Meteorites, Santa Clara Meteorite, Silver, Chronometers, Palladium, Solar System, Isotopes, Iron, Silicates, Phases, Anomalies, Meteorites
Scientific paper
Measurements of the concentration and isotopic composition of Ag and Pd in the Santa Clara iron meteorite suggest that in situ decay of Pd-107 occurred in the meteorite or its parent body. The initial solar ratio of Pd-107/Pd-110 is estimated from the observed ratio of excess Ag-107/Pd-110, and the value of the Pd ratio is incompatible with an interval of approximately 100,000,000 years between the end of nucleosynthesis and the formation of planetary objects but is compatible with a later injection of material. The inferred existence of Pd-107 and Al-26 indicates that the late injection included freshly synthesized material of both intermediate and low atomic weight on a similar time scale. The significance of the Pd-107/Ag-107 chronometer is considered.
Kelley R. W.
Wasserburg Gerald J.
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