Simulation of the radiation-induced formation of aromatic hydrocarbons on the surface of carbon-containing celestial bodies lacking an atmosphere

Details Simulation of the radiation-induced formation of aromatic hydrocarbons on the surface of carbon-containing celestial bodies lacking an atmosphere Simulation of the radiation-induced formation of aromatic hydrocarbons on the surface of carbon-containing celestial bodies lacking an atmosphere

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991geokh......893s&link_type=abstract

Geokhimiia (ISSN 0016-7525), June 1991, p. 893-897. In Russian.

Computer Science

Celestial Bodies, Cosmic Rays, Hydrocarbons, Ion Irradiation, Radiation Chemistry, Graphite, Hydrogen Ions, Nitrogen Ions, Solar Wind

Scientific paper

Possible alterations in the composition and structure of the carbon-containing surface of an atmosphereless celestial body, caused by exposure to cosmic rays, are investigated using results of an experiment in which spectroscopically pure carbon samples were subjected to radiation by accelerated ions of hydrogen, helium, or nitrogen up to a dose of 10 to the 16th/sq cm. Results showed that irradiation with H ions, as well as with He and N ions, results in an increased formation of polycyclic aromatic hydrocarbons (PAH) in the target. It was also found that the PAHs isolated after hydrogen irradiation contained about 5 times more H atoms than the number of H atoms supplied by irradiation, indicating that the source of most of the incorporated H was hydrogen adsorbed on the target surface before irradiation. It is suggested that PAHs in the graphite are formed on the basis of aromatic graphite rings.

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