1. Institute of Solid State Physics; University of Latvia; 8 Kengaraga Str. Riga LV-1063 Latvia
2. GSI Helmholtzzentrum für Schwerionenforschung; Planckstr. 1 64291 Darmstadt Germany
3. L.N. Gumilyov Eurasian National University; 5 Munaitpassov Str. 010008 Astana Kazakhstan
4. Innovative Microscopy Centre; Daugavpils University; 1 Parades Str. Daugavpils LV-5401 Latvia
5. Institute of Nuclear Physics; Ibragimov St. 1 050032 Almaty Kazakhstan