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.
On leave from Charles University Prague, Dept. of Astronomy and Astrophysics, Czechoslovakia
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© 1988 Springer-Verlag Berlin Heidelberg
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Šolc, M., Vanýsek, V., Kissel, J. (1988). Carbon-isotope ratio in PUMA 1 spectra of P/Halley dust. In: Grewing, M., Praderie, F., Reinhard, R. (eds) Exploration of Halley’s Comet. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82971-0_70
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DOI: https://doi.org/10.1007/978-3-642-82971-0_70
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