Computer Science
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.279..622f&link_type=abstract
Nature, vol. 279, June 14, 1979, p. 622-624.
Computer Science
3
Cosmic Rays, Gas Ionization, Interstellar Gas, Interstellar Radiation, Gas Dissociation, Helium Atoms, Ionic Reactions, Ionization Potentials, Molecular Interactions, Neon, Nitrogen Atoms, Oxygen Atoms
Scientific paper
Cometary material is proposed to form a significant portion of the source material of the anomalous component of cosmic rays, observed after 1973 as enhancements in O, N, He and Ne at energies between 1 and 60 MeV/n. The generally accepted explanation accounts for the anomaly in terms of the first ionization potentials of interstellar He, N, O and Ne and the ionization and acceleration of these particles within the solar cavity. Comets are considered an important additional source of anomalous ions and molecules, due to the loss rates, velocities, positions and chemical compositions of the particles shed by comets. Considerations of the dissociation energies of molecular ions lead to the prediction that molecular ions of cometary origin, for example CO(+) and OH(+) may be also detected in the anomalous component of cosmic rays.
Fowler P. H.
Redfern Michael R.
Swordy Simon P.
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