ATOM EJECTION IN LOW ENERGY SPUTTERING OF SINGLE CRYSTALS OF BCC METALS

Journal Article · Fri Mar 01 04:00:00 EST 1963 · Journal of Applied Physics (U.S.)

DOI:https://doi.org/10.1063/1.1729325· OSTI ID:4647137

Anderson, G S

The spatial distribution of atoms ejected from low index planes of the bcc metals V, Fe, Nb, Mo, Ta, and W have been studied in detail for bombardment by Hg/sup +/, Xe/sup +/, Ar/sup +/, and Ne/sup +/ ions of energies up to 800 ev. The principal atom ejection directions are the (111) and (100), which are the directions of focusing propagation in bcc crystals. Other atom ejection directions were observed in which momentum focusing is not possible. These are irterpreted to be the result of (111) focusons (directed outwardly with sufficient energy) intercepting surface atoms which are not in normal atom sites. For bombardment of (100) surfaces the center spot (STA100! ejection) appears above a certain minimum energy which increases in the order Ne, Ar, Xe, Hg. This is true for widely different masses of the target atoms, and seems to be related to the spatial distribution of momenta in the crystal. For heavier bombarding ions the momenta tend to be directed more in the forward direction and the center spot becomes less pronounced than for lighter bombarding ions. (auth)

• Research Organization: General Mills Electronics Div., Minneapolis
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-037467
• OSTI ID: 4647137
• Journal Information: Journal of Applied Physics (U.S.), Journal Name: Journal of Applied Physics (U.S.) Vol. Vol: 34; ISSN JAPIA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ARGON
ATOMS
CATIONS
DISTRIBUTION
ENERGY LEVELS
ION BEAMS
IRON
LATTICES
MASS
MERCURY
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM
MOMENTUM
MONOCRYSTALS
NEON
NIOBIUM
SURFACES
TANTALUM
TARGETS
TUNGSTEN
VANADIUM
XENON