Journal of Fusion Energy

, Volume 23, Issue 1, pp 55–62 | Cite as

The Oxygen to Carbon Ratio in the Solar Interior: Information from Nuclear Reaction Cross-Sections

  • O Manuel
  • William A Myers
  • Yashmeet Singh
  • Marcel Pleess
Article

Abstract

Mass separation in the Sun may explain a serious difficulty that has plagued nuclear astrophysics for decades: Why the oxygen to carbon ratio in the Sun’s photosphere is only two, O/C ≈ 2. After correcting for mass fractionation, the ratio of these helium-burning products in the Sun is much larger, O/C ≈ 9–10. The lower value, O/C ≈ 9, is probably more reliable. It is based on measurements of mass separation of stable noble gas isotopes in the solar wind over the mass range of 3–136 amu. The higher value, O/C ≈ 10, is based on a comparison of neutron-capture cross-sections and the abundances of s-products in the photosphere over the mass range of 25–207 amu. Both methods indicate that Fe, Ni, O, Si, and S are the most abundant elements in the Sun. These elements are produced in the deep interior of supernovae.

Keywords

Solar O/C ratio helium-burning s-products in the Sun composition of the Sun 

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References

  1. Rolf, C. E.Rodney, W. S.Schramm, D. N. eds. 1998Cauldrons in the Cosmos: Nuclear AstrophysicsUniversity of Chicago PressChicago, IL561Google Scholar
  2. Manuel, O. K., Sabu, D. D. 1977Science195208209Google Scholar
  3. Manuel, O. K., Hwaung, G. 1983Meteoritics18209222Google Scholar
  4. Burbidge, E. M., Burbidge, G. R., Fowler, W. A., Hoyle, F. 1957Rev. Mod. Phys.29547650CrossRefGoogle Scholar
  5. Barnes, C. A.Barnes,  D.Clayton, D.Schramm, D.N. eds. 1982Essays in Nuclear AstrophysicsCambridge University PressCambridge193232Google Scholar
  6. G. Wallerstein, et al. Rev. Mod. Phys., 69, 995–1084.Google Scholar
  7. Arnett, D. 1996 Supernovae and Nucleosynthesis: An Investigation of the History of Matter from the Big Bang to the PresentPrinceton University PressPrinceton, NJ598Google Scholar
  8. L. Buchmann, abstractZ214 in the Book of Abstracts for the 8th Symposium on Nuclei in the Cosmos (Vancouver, BC, p.24, 2004).Google Scholar
  9. J. W. Hammer, et al. abstractF060 in the Book of Abstracts for the 8th Symposium on Nuclei in the Cosmos (Vancouver, BC, p. 25, 2004).Google Scholar
  10. D. Schürmann for the ERNA Collaboration, abstractF163 in the Book of Abstracts for the 8th Symposium on Nuclei in the Cosmos (Vancouver, BC, p. 26, 2004).Google Scholar
  11. Deinzer, W., Salpeter, E. E. 1964Ap. J.140499509CrossRefGoogle Scholar
  12. Manuel, O., Bolon, C., Katragada, A., Insall, M. 2000J. Fusion Energy199398CrossRefGoogle Scholar
  13. Manuel, O., Miller, E., Katragada, A. 2001J. Fusion Energy20197201CrossRefGoogle Scholar
  14. O. Manuel and S. Friberg, in Huguette Lacoste, (Ed), 2002 SOHO 12/GONG + 2002 Proceedings (ESA SP–517 SOHO/GONG, Noordwijk, The Netherlands, 345–348, 2003).Google Scholar
  15. Manuel, O., Ninham, B. W., Froberg, S. E. 2002J. Fusion Energy21193198CrossRefGoogle Scholar
  16. Anders, E., Grevesse, N. 1989Geochim. Cosmochim. Acta53197214CrossRefGoogle Scholar
  17. Harkins, W. D. 1917J. Am. Chem. Soc.39856879Google Scholar
  18. Maclin, R. L., Gibbons, J. H., Inada, T. 1963Nature197369370Google Scholar
  19. Seeger, P. A., Fowler, W. A., Clayton, D. D. 1964Ap. J. Suppl.11121166CrossRefGoogle Scholar
  20. Manuel, O. K., Sabu, D. D. 1975Trans. Missouri Acad. Sci.9104122Google Scholar
  21. Zeilik, M. 1982Astronomy: The Evolving UniverseHarper & RowNew York, NY623Google Scholar
  22. Gillispie, C. C. 1970Dictionary of Scientific BiographyCharles Scribner’s SonsNew York, NY321Vol. 1Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • O Manuel
    • 1
  • William A Myers
    • 2
  • Yashmeet Singh
    • 3
  • Marcel Pleess
    • 4
  1. 1.Nuclear ChemistryUniversity of MissouriRollaUSA
  2. 2.Department of Chemical EngineeringUniversity of ArkansasFayettevilleUSA
  3. 3.Department of Computer ScienceUniversity of MissouriRollaUSA
  4. 4.Kepler-GymnasiumTuebingen, DettenhausenGermany

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