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Isotopes of rhenium

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Naturally occurring rhenium (75Re) is 37.4% 185Re, which is stable (although it is predicted to decay), and 62.6% 187Re, which is unstable but has a very long half-life (4.12×1010 years).[4] Among elements with a known stable isotope, only indium and tellurium similarly occur with a stable isotope in lower abundance than the long-lived radioactive isotope.

Quick Facts Main isotopes, Decay ...
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There are 36 other unstable isotopes recognized, the longest-lived of which are 183Re with a half-life of 70 days, 184Re with a half-life of 38 days, 186Re with a half-life of 3.7186 days, 182Re with a half-life of 64.0 hours, and 189Re with a half-life of 24.3 hours. There are also numerous isomers, the longest-lived of which are 186mRe with a half-life of 200,000 years and 184mRe with a half-life of 177.25 days.[5] All others have half-lives less than a day.

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List of isotopes

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More information Nuclide, Z ...
  1. [n 1]
    mRe – Excited nuclear isomer.
  2. [n 2]
    ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. [n 3]
    # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. [n 4]
    Bold half-life – nearly stable, half-life longer than age of universe.
  5. [n 5]
    # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  6. [n 6]
    Modes of decay:
    α:Alpha decay
    β+:Positron emission
    EC:Electron capture
    β−:Beta decay
    IT:Isomeric transition
    p:Proton emission
  7. [n 7]
    Bold italics symbol as daughter – Daughter product is nearly stable.
  8. [n 8]
    Bold symbol as daughter – Daughter product is stable.
  9. [n 9]
    ( ) spin value – Indicates spin with weak assignment arguments.
  10. [N 10]
    Order of ground state and isomer is uncertain.
  11. [N 11]
    Believed to undergo α decay to 181Ta
  12. [N 12]
    Theoretically capable of β− decay to 186Os
  13. [N 13]
    primordial radionuclide
  14. [N 14]
    Used in rhenium–osmium dating
  15. [N 15]
    Can undergo Bound-state β− decay with a half-life of 32.9 years when fully ionized
  16. [N 16]
    Theorized to also undergo α decay to 183Ta
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Rhenium-186

Rhenium-186 is a beta emitter and radiopharmaceutical that is used to treat glioblastoma,[7] is used in theranostic medicine[8] and has been reported to be used in synoviorthesis.[9]

References

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