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A search for C60 in carbonaceous chondritesAnalysis of interior samples of the Murchison meteorite by two routes yielded an upper limit of 2 ppb for its C60 content, as compared to parts per million levels for individual polycyclic aromatic hydrocarbons (PAHs ). Provided the samples contain an interstellar component, which is probable since Murchison hydrocarbons contain excess deuterium, this result argues against the ubiquitous presence of C60 in the interstellar medium. A possible explanation for the absence of C60 was found in experiments showing how PAHs replace fullerenes as stable end products when hydrogen is present during carbon condensation. As a secondary result we found high molecular weight PAHs in the Murchison and Allende meteorites. Coronene and its methyl derivatives are especially interesting since features in the coronene spectrum have been shown to match some of the unidentified interstellar infrared emission bands.
Document ID
19930045399
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
De Vries, M. S.
(NASA Ames Research Center Moffett Field, CA, United States)
Reihs, K.
(NASA Ames Research Center Moffett Field, CA, United States)
Wendt, H. R.
(NASA Ames Research Center Moffett Field, CA, United States)
Golden, W. G.
(NASA Ames Research Center Moffett Field, CA, United States)
Hunziker, H. E.
(IBM Almaden Research Center San Jose, CA, United States)
Fleming, R.
(Charles Evans and Associates Redwood City, CA, United States)
Peterson, E.
(NASA Ames Research Center Moffett Field, CA, United States)
Chang, S.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 57
Issue: 4
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
93A29396
Funding Number(s)
CONTRACT_GRANT: NAS2-13178
Distribution Limits
Public
Copyright
Other

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