Electron-impact ionization cross sections of small molecules containing Fe and Cr *

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We present the electron-impact ionization cross sections(EICSs) of iron and chromium hydrides, nitrides, and oxides. The motivation of this work stems from the fact that chemical sputtering from a steel surface exposed to a hot plasma can create these molecules which in turn influence the composition and energy balance of the plasma. The latter influence is quantified by the EICS which we derive by using two semi-empirical methods which can be employed in the relevant energy range of 10-1000 eV. They are important molecular properties for plasma- and materials science. We discuss the foundations of the methods and present the cross sections of the high- and low-spin states of the species in their neutral ground states and of their cations.

Original languageEnglish
Article number374001
Number of pages8
JournalJournal Of Physics-Condensed Matter
Issue number37
Publication statusPublished - Sept 2022


  • ionization
  • electron impact
  • cross section
  • plasma physics
  • plasma surface interaction


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