Field desorption of helium and neon

摘要: Employing our energy‐focused atom‐probe FIM, providing high resolution and freedom from artifacts, we have obtained complete crystallographic distribution of helium neon field adsorbed on W, Mo, Ta, Rh, Ir, Pt, Re. In addition determined the abundance metal–helium metal–neon molecular ions these metals as by evaporation. The dependence relative molecule upon substrate temperature surface area is established. Whereas triply charged Re helides doubly other are predominant ion species in pulsed evaporation, metal–neides formed with a probability less than 10−3. We were unable to confirm precise instrument IrHe+++ IrNe++ indirectly deduced Panitz. convinced that IrNe+++ reported Waugh observations time‐gated imaging desorption micro...