Thermal diffusion of 57Co into rhodium matrix was studied. The diffusion degree was evaluated by Mössbauer spectroscopy with the use of α-Fe absorber. The influence of different annealing conditions was investigated. For a set of sources examined, smooth and rounded Lorentzian lines were observed. The main spectra parameters were fairly acceptable with respect to the typical obtainable values for α-Fe absorbers in Mössbauer spectroscopy. The results obtained confirmed that the deposited 57Co diffused almost completely into rhodium matrix without substantial loss of the activity deposited.

Thermal Diffusion of 57Co into Rhodium Matrix as a Second Step in Preparing Mössbauer Sources. I.Cieszykowska, M.Żółtowska, P.Zachariasz, A.Piasecki, T.Janiak, M.Mielcarski: Applied Radiation and Isotopes, 2011, 69[9], 1193-7