Simulation of Positron Annihilation Response to Mechanical Deformation of Nanostructured AgCo

O. Melikhova a,; b, J. Kuriplach a, J. Čížek a, I. Procházka a, M. Hou b, S. Pisov b,; c and E. Zhurkin b, d a Department of Low Temperature Physics, Faculty of Mathematics and Physics, Charles University in Prague, V Holesovickach 2, CZ-180 00 Prague 8, Czech Republic b Physique des Solides Irradiés et des Nanostructures CP234, Université Libre de Bruxelles, Bd du Triomphe, B-1050 Brussels, Belgium c Faculty of Physics, University of Sofia, 5 James Bourchier str., 1164 Sofia, Bulgaria d Department of Experimental Nuclear Physics, Physical & Mechanical Faculty, K-89, St. Petersburg State Polytechnical University, 29 Polytekhnicheskaya str., 195251 St. Petersburg, Russia

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Received: 3 09 2007;

Nanostructured materials attract nowadays a broad attention due to their specific properties. Defects play an essential role in material properties so their characterisation is very important. The evolution of the various open volume defects in AgCo nanowire modelled samples obtained using molecular dynamics was studied. Isothermal and isoenergetic deformation mechanisms are considered. General analyses of open volume defects concerning their size and their chemical environment were performed. Positron lifetimes, binding energies, and high momentum parts of the momentum distribution of annihilation γ-quanta were calculated for selected defects.

DOI: 10.12693/APhysPolA.113.1455 PACS numbers: 78.70.Bj, 71.15.Pd, 61.46.Hk