Desorption of positive oxygen ions induced by keV heavy-ion bombardment of transition metals with adsorbed O sub 2 and CO

Journal Article · Thu Nov 30 23:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.10677· OSTI ID:5090554

Kaurin, M G ^[1]; Weller, R A ^[2]

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1. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 (USA)
2. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 Department of Materials Science and Engineering, Vanderbilt University, Nashville, Tennessee 37235 (USA)

We report measurements of O{sup +} secondary-ion emission induced by 25--250-keV Ne{sup +}, Ar{sup +}, and Kr{sup +} bombardment of oxidized surfaces of Ti, Mo, Nb, W, and Ni, and of Ni and Pd surfaces with adsorbed CO. The yield {ital I}(O{sup +}) of O{sup +} from bombardment of oxygen adsorbed onto nickel, as well as the yields of all metal and metal-oxide ions, exhibits behavior similar to the sputtering yields as functions of incident ion energy. By contrast, the yield of O{sup +} from the other oxidized targets increases linearly with projectile velocity {ital v}, making {ital dI}(O{sup +})/dv a convenient, velocity-independent parameter with which to characterize the emission. The variation of {ital dI}(O{sup +})/dv with projectile species depends on the substrate. For Ti and, to a lesser extent, Nb, {ital dI}(O{sup +})/dv is independent of projectile species, although for Mo and W {ital dI}(O{sup +})/dv varies with projectile species in a manner similar to the corresponding variation of the electronic stopping power of the projectile. However, the magnitude of the observed O{sup +} yields is not consistent with that expected if the O{sup +} emission is produced by secondary-electron-stimulated desorption. {ital I}(O{sup +}) for bombardment of Ni and Pd surfaces with adsorbed CO is not clearly related to either the sputtering yield or the O{sup +} yields from the oxidized targets.

• OSTI ID: 5090554
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:16; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ARGON IONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
ION COLLISIONS
ION EMISSION
IONS
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KRYPTON IONS
METALS
MOLYBDENUM
NEON IONS
NICKEL
NIOBIUM
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OXYGEN IONS
PALLADIUM
PLATINUM METALS
SPUTTERING
TITANIUM
TRANSITION ELEMENTS
TUNGSTEN