Correlation Between U/Th and Pb/Os Abundance Ratios and its Application in Nuclear Cosmochronology
The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is quite robust with respect to astrophysical conditions. The U/Th–Pb/Os correlation is applied to provide customized initial abundance ratios U/Th...
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          | Published in | The Astrophysical journal Vol. 988; no. 1; pp. 22 - 28 | 
|---|---|
| Main Authors | , , , | 
| Format | Journal Article | 
| Language | English | 
| Published | 
        Philadelphia
          The American Astronomical Society
    
        20.07.2025
     IOP Publishing  | 
| Subjects | |
| Online Access | Get full text | 
| ISSN | 0004-637X 1538-4357 1538-4357  | 
| DOI | 10.3847/1538-4357/ade390 | 
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| Abstract | The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is quite robust with respect to astrophysical conditions. The U/Th–Pb/Os correlation is applied to provide customized initial abundance ratios U/Th from the observed abundance ratios Pb/Os for six r -process enhanced metal-poor stars. The ages of these six metal-poor stars are predicted by the U/Th chronometer, which are approximately between 11 and 15 Gyr. Their ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation. | 
    
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| AbstractList | The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is quite robust with respect to astrophysical conditions. The U/Th–Pb/Os correlation is applied to provide customized initial abundance ratios U/Th from the observed abundance ratios Pb/Os for six r -process enhanced metal-poor stars. The ages of these six metal-poor stars are predicted by the U/Th chronometer, which are approximately between 11 and 15 Gyr. Their ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation. | 
    
| Author | Wu, X. H. Huang, Y. Y. Cui, Q. Q. Zhang, S. Q.  | 
    
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| Snippet | The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is... The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r-process are found to have a strong correlation. This correlation is...  | 
    
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| SubjectTerms | Abundance Background radiation Correlation Cosmic microwave background Measuring instruments Metallicity Nuclear abundances Nuclear astrophysics R-process Radioisotopes Stellar ages Thorium  | 
    
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| Title | Correlation Between U/Th and Pb/Os Abundance Ratios and its Application in Nuclear Cosmochronology | 
    
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