Positron Annihilation in Pd-Ag-H and Pd-Au-H Systems

• Authors: E. Dębowska
• Languages of publication: EN

Abstracts

EN

Positron annihilation method was used to study hydrogenated Pd_{1-y}Ag_{y}, and Pd_{1-y}Ag_{y} alloys in α-phase. In both systems, insensitivity of the low-lying core states to the presence of hydrogen in the alloy was found. Rigid band mode1 appeared to be a useless description of the changes in the band occupation after hydrogen absorption. The results seem to indicate that the "capacity" of the low-lying H-Pd bonding states remains constant when the Ag or Au atoms are added to PdH_{≈0.6}, which can explain the existence of the limit to the summed up hydrogen and Ag(Au) concentration.

Keywords

EN

78.70.Bj; 71.25.Pi; 71.90.+q

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 71.90.+q: Other topics in electronic structure (restricted to new topics in section 71)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 83
• Issue: 3
• Pages: 287-292

Dates

published

1993-03

Contributors

author

E. Dębowska

• Institute of Experimental Physics, Wrocław University, pl. Maxa Borna 9, 50-204 Wrocław, Poland

Identifiers

DOI

10.12693/APhysPolA.83.287