Positron states on the Cs/Cu(100) surface

Conference · Fri Feb 01 00:00:00 EST 1991 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5023067

Koeymen, A R; Lee, K H; Mehl, D; Weiss, A ^[1]; Jensen, K O ^[2]

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1. Physics Department, University of Texas at Arlington, Texas (USA)
2. School of Mathematics and Physics, University of East Anglia, Norwich NR4 7TJ (United Kingdom)

The attenuation of the CuM{sub 23}VV Auger peak with Cs coverage on Cu(100) is measured using both positron-annihilation-induced Auger electron emission (PAES) and conventional (electron induced) Auger electron spectroscopy (EAES). The Cs coverage varies from 0 to 1 physical monolayer (ML). The data indicates that below 0.5 ML in agreement with first order theoretical calculations the positrons are trapped at the Cu/Cs interface. At higher Cs coverages the thermal desorption of the positrons as positronium drops the PAES intensity to zero whereas the EAES signal changes linearly as expected.

• OSTI ID: 5023067
• Report Number(s): CONF-900798-; CODEN: APCPC
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 218:1; Conference: 4. international workshop on slow-positron beam techniques for solids and surfaces, London (Canada), 3-6 Jul 1990; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
CESIUM
POSITRON COLLISIONS
POSITRONS
ANNIHILATION
DESORPTION
AUGER ELECTRON SPECTROSCOPY
LAYERS
POSITRONIUM
ALKALI METALS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
COLLISIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON SPECTROSCOPY
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
INTERACTIONS
LEPTONS
MATTER
METALS
PARTICLE INTERACTIONS
SPECTROSCOPY
656002* - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)
360104 - Metals & Alloys- Physical Properties