POSITRON ANNIHILATION IN DEFORMED AND HYDROGENATED Cu-50% Pd ALLOY

J. Pajak1, R. Pietrzak1, M. Szuszkiewicz2

1 Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland,
2 Institute of Experimental Physics, Wroclaw University, Maxa Borna 9, 50-204 Wroclaw, Poland


The measurements of the recovery curves and positron lifetime spectra in the deformed by cold rolling, hydrogen free, and hydrogenated CuP with 50 at.% Pd samples have been performed. Additionally, positron lifetime data for annealed at 973 K for 6 h hydrogen free and hydrogenated samples are presented. It has been found that hydrogen is probably trapped at dislocations and voids, and can create the hydrogen vacancy complexes which can further agglomerate to vacancy clusters.