Investigation of proton-irradiated platinum by Moessbauer spectroscopy

The Moessbauer emission spectroscopy method has been applied to investigate the annealing of radiation damage in platinum (with the addition of 57Co isotope) after irradiation with 1 MeV protons at 90 K to the dose of 5x1017cm-2. The analysis of spectra evolution as a function of annealing temperature enabled four components to be highlighted alongside with the initial one that corresponds to the location of 57Co atoms in a substitutional position of platinum lattice. From their thermal annealing character four ''defect'' sites are identified as followers: site 1 - as corresponding to the trapping at 57Co probe atoms of hydrogen atoms, sites 2 and 3 - to the trapping of SIA-H complexes, and site 4 - to that of vacancy-H complexes. 10 refs.; 2 figs.; 1 tab. (author)