Isotope effect in the study of H-W(100) and O-W(100) chemisorption systems using SIMS

Abstract

Large isotope effects were observed in the secondary ion yields when chemisorbed layers of H, D, 16O, and 18O on W(100) were sputtered with low energy Ne + ions. Higher isotopic mass in general lowered both the atomic ion yields (H −, D −, O + and O −) and the molecular ion yield (WO 2 −), except for H + (D +) where the converse was true.