Cs/transition metal composite surfaces: First principles calculations of high Z, low work function systems

Journal Article · Thu Mar 01 00:00:00 EST 1984 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.34418· OSTI ID:5679756

Freeman, A J; Wimmer, E; Chubb, S R; Hiskes, J R; Karo, A M

Some salient features of the experimental and theoretical data pertaining to hydrogen negative ion generation on minimum-work-function composite surfaces consisting of Cs/transition metal substrates are reviewed. Cesium or hydrogen ion bombardment of a cesium-activated negatively-biased electrode exposed to a cesium-hydrogen discharge results in the release of hydrogen negative ions. These ions originate through desorption of hydrogen particles by incident cesium ions, desorption by incident hydrogen ions, and by backscattering of incident hydrogen. Each process is characterized by a specific energy and angular distribution. The calculation of ion formation in the crystal selvage region is discussed for different approximations to the surface potential. Results of ab initio, all-electron, local density function calculations for the composite surface electronics of Cs on W(001) and Mo(001) are presented and discussed.

• Research Organization: Physics Department, Northwestern University, Evanston, Illinois 60201
• OSTI ID: 5679756
• Report Number(s): CONF-831180-; TRN: 86-019606
• Journal Information: AIP Conf. Proc.; (United States), Vol. 111:1; Conference: 3. international symposium on the production and neutralization of negative ions and beams, Upton, NY, USA, 14 Nov 1983
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM PRODUCTION
REVIEWS
CESIUM
ION COLLISIONS
POTENTIALS
WORK FUNCTIONS
HYDROGEN IONS 1 MINUS
TUNGSTEN
COVERINGS
ATOM COLLISIONS
CESIUM IONS
COMPOSITE MATERIALS
ELECTRIC DISCHARGES
EXPERIMENTAL DATA
HYDROGEN IONS
SUBSTRATES
THEORETICAL DATA
TRANSITION ELEMENTS
ALKALI METALS
ANIONS
CHARGED PARTICLES
COLLISIONS
DATA
DOCUMENT TYPES
ELEMENTS
FUNCTIONS
INFORMATION
IONS
MATERIALS
METALS
NUMERICAL DATA
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions