Electron stimulated desorption of H − ions from condensed acetic acid

Abstract

The interaction between low energy electrons and condensed acetic acid has been investigated considering H − and D − ions Electron Stimulated Desorption from the three isotopic forms CD 3COOD, CD 3COOH and CH 3COOD. For all isotopic forms the yields of desorbing H −(D −) ions are nearly identical, peaking at an incident electron energy of ∼9.75 eV, and no differences are observed in H −(D −) kinetic energy distributions. The intensities of H − and D − ion signals from CD 3COOH and CH 3COOD suggest a selectivity in the production of ions, that seems more efficient from the acid group –COOH(D) than from the methyl group –CH(D) 3 of these molecules.