Efficiency of molecular hydrogen formation on silicates

Valerio Pirronello*, Ofer Biham, Ciu Liu, Lyong Shen, Gianfranco Vidali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

158 Scopus citations


We report on laboratory measurements of molecular hydrogen formation and recombination on an olivine slab as a function of surface temperature under conditions relevant to those encountered in the interstellar medium. On the basis of our experimental evidence, we recognize that there are two main regimes of H coverage that are of astrophysical importance; for each of them we provide an expression giving the production rate of molecular hydrogen in interstellar clouds.

Original languageAmerican English
Pages (from-to)L131-L134
JournalAstrophysical Journal
Issue number2 PART II
StatePublished - 1997


  • Dust, extinction
  • ISM: abundances
  • ISM: molecules
  • Molecular processes


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