Low-temperature dissociative recombination of E + H3(+)

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Hydrogen Ions, Hydrogen Recombinations, Interstellar Gas, Ionic Collisions, Rydberg Series, Molecular Clouds, Recombination Reactions

Scientific paper

Accurate ab initio calculations of the ground and excited H3 potential energy surfaces have been carried out. These surfaces have been examined at geometries appropriate for an analysis of the reaction products of e+H3+ dissociative recombination. It is found that direct recombination of electrons with H3+ ions in their ground vibrational state is very unlikely for low collisional energies. The authors estimate that the currently accepted values of the e+H3+ recombination coefficient for interstellar conditions are two orders of magnitude too large.

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