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Ion irradiation effects on sooting flames by-products

Published online by Cambridge University Press:  01 February 2008

R. Brunetto ,
T. Pino ,
E. Dartois ,
A. T. Cao ,
L. d'Hendecourt ,
G. Strazzulla  and
Ph. Bréchignac
R. Brunetto
Affiliation:
Institut d'Astrophysique Spatiale, UMR-8617, Université Paris-Sud, 91405 Orsay Cedex, France email: rosario.brunetto@ias.u-psud.fr Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France INAF – Osservatorio Astrofisico, via S. Sofia 78, I-95123 Catania, Italy
T. Pino
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France
E. Dartois
Affiliation:
Institut d'Astrophysique Spatiale, UMR-8617, Université Paris-Sud, 91405 Orsay Cedex, France email: rosario.brunetto@ias.u-psud.fr
A. T. Cao
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France
L. d'Hendecourt
Affiliation:
Institut d'Astrophysique Spatiale, UMR-8617, Université Paris-Sud, 91405 Orsay Cedex, France email: rosario.brunetto@ias.u-psud.fr
G. Strazzulla
Affiliation:
INAF – Osservatorio Astrofisico, via S. Sofia 78, I-95123 Catania, Italy
Ph. Bréchignac
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France
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Abstract

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Carbonaceous extraterrestrial matter is observed in a wide variety of astrophysical environments. Spectroscopic signatures reveal a large variety of chemical structure illustrating the rich carbon chemistry that occurs in space. In order to produce laboratory analogues of the carbonaceous cosmic dust, a new chemical reactor has been built in the Laboratoire de Photophysique Moléculaire. It is a low pressure flat burner providing flames of premixed hydrocarbon/oxygen gas mixtures, closely following the model system used by the combustion community. In such a device the flame is a one-dimensional chemical reactor offering a broad range of combustion conditions and sampling which allows production of many and various by-products. In the present work, we have studied the effect of ion irradiation (200-400 keV), at the Laboratorio di Astrofisica Sperimentale in Catania, on several samples, ranging from strongly aromatic to strongly aliphatic materials. Infrared and Raman spectra were monitored to follow the evolution of the films under study, and characterize the irradiation process-induced modifications.

Keywords

Astrochemistrymethods: laboratoryISM: dustcosmic rays
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S251: Organic Matter in Space , February 2008 , pp. 435 - 436
Copyright
Copyright © International Astronomical Union 2008

References

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