Positron Annihilation in Pd-Ag-H and Pd-Au-H Systems |
| E. Dębowska Institute of Experimental Physics, Wrocław University, pl. Maxa Borna 9, 50-204 Wrocław, Poland |
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| Positron annihilation method was used to study hydrogenated Pd1-yAgy, and Pd1-yAgy 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. |
| DOI: 10.12693/APhysPolA.83.287 PACS numbers: 78.70.Bj, 71.25.Pi, 71.90.+q |