The enhanced β-decay rate of ionized187Re in stars has been studied within the context of a detailed numerical model of the production ofr-process elements and their recycling through stars during the course of galactic evolution. It is concluded that the enhanced decay rate does not significantly reduce the Re-Os chronometer age for the Galaxy. Consequently, the187Re β-decay half-life and the neutron cross-section ratio σ(186Os)/σ(187Os) remain as the significant uncertainties in this chronology. Unlike the uncertainties in other chronologies, both are amenable to laboratory measurements.
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Talbot, R.J. 187Re, recyclingR-process elements through stars, and the age of the Galaxy. Astrophys Space Sci 20, 241–249 (1973). https://doi.org/10.1007/BF00645600
- Numerical Model
- Decay Rate
- Laboratory Measurement
- Significant Uncertainty
- Galactic Evolution