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Carbon-isotope ratio in PUMA 1 spectra of P/Halley dust

  • M. Šolc
  • V. Vanýsek
  • J. Kissel
Conference paper

Summary

Carbon isotopes 12C and 13C have yet been identified both in cometary gas and dust. Although the determination from optical C2 and CN emissions from ground-based observations is not precise, the ratio 12C/13C is roughly the same as the mean ratio derived from PUMA 1 mass spectra of cometary grains. This value both in volatile and refractory material does not differ much from the nominal solar system value 90. However, the collection of 38 PUMA 1 mode 0 spectra shows surprisingly variable 12/13 amu lines ratio within 3 decades, increasing with carbon abundance in the grains. Possible instrumental effects are discussed.

Key words

comets isotopic ratio 

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References

  1. Encrenaz, T.: 1984, in Isotopic Ratios in the Solar System, C.N.E.S. Paris, p. 175Google Scholar
  2. Festou, M.C.: 1986 (private communication)Google Scholar
  3. Jessberger, K. E., Kissel, J., Fechtig, H., Krueger, F.: 1986, in Comet Nucleus Sample Return,ESA SP-240, p. 27Google Scholar
  4. Kissel, J.: 1986, The Giotto Mission, ESA SP-1077, p. 67Google Scholar
  5. Kissel, J., Krueger, F.: 1987, Nature 326, 755ADSCrossRefGoogle Scholar
  6. Krishna Swamy, K.S.: 1986, 20the ESLAB Symp., ESA SP-250, Vol. III, p. 3Google Scholar
  7. Sagdeev, R.Z. et al.: 1985, Venus-Halley Mission, ed. Louis-Jean, GapGoogle Scholar
  8. Vanýsek, V., Rahe, J.: 1978, Moon Planets 18, 441ADSCrossRefGoogle Scholar
  9. Vanýsek, V.: 1986, in Astrochemistry, IAU Symp. 120, eds. M.S. Vardýa, S. P. Tarafdar, Dordrecht, Reidel, Dordrecht, p. 461Google Scholar
  10. Wehinger, P. A.: 1986, 20th ESLAB Symp., ESA S P-240, Vol. III, p. 473Google Scholar
  11. Wehinger, P. A.: 1986, 20th ESLAB Symp., ESA SP-250, Vol. III,p. 475Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • M. Šolc
    • 1
  • V. Vanýsek
    • 2
  • J. Kissel
    • 1
  1. 1.Max-Planck-Institut für KernphysikHeidelbergFederal Republic of Germany
  2. 2.Dept. of Astronomy and AstrophysicsCharles University PraguePraha 5Czechoslovakia

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