Inner-shell processes as probes of multicharged ion neutralization at surfaces

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6638559

Meyer, F W; Havener, C C; Overbury, S H; Reed, K J; Snowdon, K J; Zehner, D M

We have measured energy distributions for electrons emitted during grazing collisions of multicharged ions with Au and Cu single crystals in the projectile energy range 20--90 keV. The measured electron spectra are characterized by discrete peaks resulting from Auger transitions, superimposed on a broad continuum electron distribution. Auger electron emission from both projectile and target atoms has been observed. The projectile Auger electrons result from the decay of inner-shell vacancies either carried into the collision or produced by vacancy transfer from empty outer projectile levels via pseudocrossings or rotational coupling of molecular orbitals. The latter mechanism may also lead to the creation of target inner-shell vacancies which give rise to Auger electron emission characteristic of the target. An analysis of these Auger electron features is presented which is aimed, on the one hand, at elucidating detailed production mechanisms, and, on the other, at obtaining information on the time scales describing the neutralization of multicharged ions during their interaction with metal surfaces. 24 refs., 10 figs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400; W-7405-ENG-48
• OSTI ID: 6638559
• Report Number(s): CONF-880955-4; ON: DE89004166
• Country of Publication: United States
• Language: English

Related Subjects

656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOM COLLISIONS
AUGER EFFECT
COLLISIONS
COPPER
ELECTRON SPECTRA
ELEMENTS
GOLD
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
ION-NEUTRALIZATION SPECTROSCOPY
IONIZATION
MEASURING INSTRUMENTS
METALS
SPECTRA
SPECTROSCOPY
SURFACES
TRANSITION ELEMENTS