Sputtering of tungsten: an atomic view of a near-surface depleted zone created by a single 30 keV /sup 63/Cu/sup +/ projectile. Report No. 4118

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5728371

Current, M. I.; Seidman, D. N.

The vacancy structure of a near-surface depleted zone (DZ), created by a single 30 keV /sup 63/Cu/sup +/ ion in a tungsten field-ion microscope (FIM) specimen, was determined with atomic resolution. Both the irradiation and pulse field-evaporation experiments were performed in situ at less than or equal to 11 K, so that the observed vacancy structure was unaltered by the long-range migration of self-interstitial atoms. The following basic physical quantities were measured: (1) the number of vacancies; (2) the dimensions; (3) the vacancy concentration; (4) the distribution of first-nearest-neighbor vacancy clusters; and (5) the radial-distribution function for the vacancies out to ninth-nearest neighbor. The values of these quantities were shown to be similar for both the near-surface DZ and DZs created in the bulk of the same specimen by 30 keV /sup 63/Cu/sup +/ projectiles.

• Research Organization: Cornell Univ., Ithaca, NY (USA). Materials Science Center
• DOE Contract Number: EY-76-S-02-3158
• OSTI ID: 5728371
• Report Number(s): COO-3158-80; CONF-790843-11
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC IONS
CHARGED PARTICLES
COLLISIONS
COPPER IONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELEMENTS
ENERGY RANGE
ION COLLISIONS
ION MICROSCOPY
IONS
KEV RANGE
KEV RANGE 10-100
LINE DEFECTS
METALS
MICROSCOPY
POINT DEFECTS
REFRACTORY METALS
SPUTTERING
SURFACE PROPERTIES
TRANSITION ELEMENTS
TUNGSTEN
VACANCIES