Carbon Raman Spectroscopy of 36 Interplanetary Dust Particles
Physics and Astronomy
Carbon Raman spectroscopy is a useful tool to determine the degree of order of organic material (OM) in extra-terrestrial matter. As shown for meteoritic OM [e.g., 2], peak parameters of D and G bands are a measure of thermal alteration, causing graphitization (order), and amorphization, e.g. during protoplanetary irradiation, causing disorder. Th e most pristine interplanetary dust particles (IDPs) may come from comets. However, their exact provenance is unknown. IDP collection during Earth?s passage through comet Grigg-Skjellerup?s dust stream ("GSC" collectors) may increase the probability of collecting fresh IDPs from a known, cometary source. We used Raman spectroscopy to compare 21 GSC-IDPs with 15 IDPs collected at different periods, and found that the variation among GSC-IDPs is larger than among non-GSC IDPs, with the most primitive IDPs being mostly GSC-IDPs.
Presented at the 72nd Annual Meeting of the Meteoritical Society, abstract number 5412.
Meteoritics and Planetary Science
H. Busemann, L.R. Nittler, J. Davidson, I.A. Franchi, S. Messenger, K. Nakamura-Messenger, R.L. Palma, and R.O. Pepin, 2009. Carbon Raman Spectroscopy of 36 Interplanetary Dust Particles. Meteoritics and Planetary Science 44, A46.
Publisher's Copyright and Source
Copyright © 2009 The Meteoritical Society. Article published by the Meteoritical Society in Meteoritics and Planetary Science, volume 44, issue number S7, July 2009, page A46. Available online on January 26, 2010: http://doi.org/10.1111/j.1945-5100.2009.tb01099.x.