Slow position studies on clean and oxygen-exposed Sn(100) surfaces
Journal Article
·
· Phys. Rev., B: Condens. Matter; (United States)
A well-characterized Sn(100) sample was examined with monoenergetic positrons before and after exposure to oxygen. The positronium formation at the surface was measured as a function of sample temperature, incident positron energy, and oxygen exposure. The positronium fraction increased both with sample temperature and oxygen exposure, but decreased with increasing incident positron energy. Positronium formation from thermally activated detrapping of the positron from the surface state is observed providing an estimate of the positron binding energy to this surface state. No change was found in the positronium fraction when the Sn(100) crystal was exposed to hydrogen suggesting a lack of interaction between hydrogen and Sn. In all of the above cases positronium was emitted but no positron re-emission was observed; this result suggests a negative positronium work function but a positive positron work function.
- Research Organization:
- Brookhaven National Laboratory, Upton, New York 11973
- OSTI ID:
- 5381119
- Journal Information:
- Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 21:11; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Mon Jul 30 00:00:00 EDT 1979
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·
OSTI ID:5940719
Slow positron studies on single crystals of Ag(100), Ag(111) and Cu(111). [0 to 5 KeV, 300 to 1200/sup 0/K]
Conference
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Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:6286117
Slow positrons in metal single crystals. I. Positronium formation at Ag(100), Ag(111), and Cu(111) surfaces
Journal Article
·
Tue Jul 01 00:00:00 EDT 1980
· Phys. Rev., B: Condens. Matter; (United States)
·
OSTI ID:5256299
Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
640303 -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BEAMS
BINDING ENERGY
CHEMICAL REACTIONS
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY DEPENDENCE
FERMIONS
LEPTON BEAMS
LEPTONS
METALS
OXIDATION
PARTICLE BEAMS
POSITRON BEAMS
POSITRON COLLISIONS
POSITRONIUM
POSITRONS
SURFACES
SYNTHESIS
TEMPERATURE DEPENDENCE
TIN
WORK FUNCTIONS
360104* -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
640303 -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BEAMS
BINDING ENERGY
CHEMICAL REACTIONS
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY DEPENDENCE
FERMIONS
LEPTON BEAMS
LEPTONS
METALS
OXIDATION
PARTICLE BEAMS
POSITRON BEAMS
POSITRON COLLISIONS
POSITRONIUM
POSITRONS
SURFACES
SYNTHESIS
TEMPERATURE DEPENDENCE
TIN
WORK FUNCTIONS