Production of molecular hydrogen by cosmic rays in interstellar clouds - A relevant process?

Details Production of molecular hydrogen by cosmic rays in interstellar clouds - A relevant process? Production of molecular hydrogen by cosmic rays in interstellar clouds - A relevant process?

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...196..201p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. 201-206.

Astronomy and Astrophysics

Astrophysics

19

Cosmic Rays, Gas Evolution, Hydrogen, Interstellar Matter, Molecular Clouds, Cosmic Dust, Molecular Gases, Monte Carlo Method

Scientific paper

The production of molecular hydrogen in dense interstellar clouds is considered. The authors evaluate the production of molecular hydrogen by bombardment of grain icy mantles from low energy cosmic rays. A Monte Carlo simulation of this process has been performed on the basis of the experimental evidence that H2 is released by hydrogen-rich frozen gas (H2O, CH4, NH3, C6H6, C6H12) irradiated by energetic (keV - MeV) ions. The main result is that the production rate of H2 can be orders of magnitude higher than the recombination rate of H atoms adsorbed on amorphous grains at temperatures of about 10K, characteristic of a cloud core.

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