Accession Number:

ADA183167

Title:

Inelastic Ion-Surface Collisions.

Descriptive Note:

Technical rept.,

Corporate Author:

HOUSTON UNIV TX DEPT OF CHEMISTRY

Personal Author(s):

• Rabalais,J. W.

Report Date:

1987-05-15

Pagination or Media Count:

19.0

Abstract:

Ion scattering and direct recoil spectrometries were used to investigate electronic excitation and charge transfer processes occuring during rare gas ion bombardment of CuLi alloy. Excitations in the close encounter appear to be governed by the degree of inner shell mixing between the colliding pair. Excitations in the outgoing trajectory are governed by the probabilities of Auger and resonant charge exchange between the scattered or recoiled particle and the surface. Measurements of the vacuum ultraviolet photon emission of the scattered and recoiled particles proved to be unsuccessful due to low photon yields. The ion induced surface damage to transition metal fluoroanions was investigated by XPS and UPS. Ion bombardment reduces the transition metal atom to lower oxidation states, in some cases all the way to the metal. These results are consistant with the thermal spike model of ion damage. Keywords Ion surface collisions Emission Scattering Recoiling Copper Lithium alloy.

Descriptors:

• *CHARGE TRANSFER
• *IONS
• *ION BOMBARDMENT
• RECOIL
• MIXING
• SHELLS(STRUCTURAL FORMS)
• DAMAGE
• SCATTERING
• PHOTONS
• YIELD
• COPPER ALLOYS
• LITHIUM ALLOYS
• ELECTRONS
• EXCITATION
• TRAJECTORIES
• PARTICLES
• AUGERS
• PROBABILITY
• RESONANCE
• MODELS
• SPIKES
• THERMAL PROPERTIES
• ATOMS
• TRANSITION METALS
• PARTICLES
• RARE GASES
• TRANSITION METALS
• EMISSION
• VACUUM ULTRAVIOLET RADIATION

Subject Categories:

• Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE