Changes of natural isotopic abundances in the KOSI comet simulation experiments

Details Changes of natural isotopic abundances in the KOSI comet simulation experiments Changes of natural isotopic abundances in the KOSI comet simulation experiments

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992angeo..10..232r&link_type=abstract

(Modelling, simulation and sounding of cometary nuclei; Proceedings of the International Workshop, Cagliari, Italy, May 28-30, 1

Computer Science

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4

Abundance, Chemical Composition, Comet Nuclei, Deuterium, Oxygen 18, Space Environment Simulation, Insolation, Radiation Effects

Scientific paper

Results are presented of the KOSI-7 comet simulation experiment in which samples were taken from the analog body at 90-110 K in a liquid nitrogen-cooled glove box. The H2O phase was analyzed for its D and O-18 abundances. An enrichment of both isotopes (from delta(D) of -47.7 per mil in the unirradiated sample to delta(D) of -35.7 per mil in the insolated and delta(O-18) of -6.40 per mil to delta(O-18) of -4.27 per mil) was observed for the crustal region formed via sintering near the surface. The interior did not exhibit isotopic anomalies, not even at the CO2 zone of recrystallization.

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