1. Institute of Physics; AS CR; v.v.i. Cukrovarnická 10 16200 Prague 6 Czech Republic
2. Faculty of Nuclear Sciences and Physical Engineering; Czech Technical University; Trojanova 13 12000 Prague 2 Czech Republic
3. INESC-MN and IN-Institute of Nanoscience and Nanotechnology; Rua Alves Redol 9; 1000-029 Lisboa Portugal
4. Department of Therapeutic Radiology and Oncology; Innsbruck Medical University; Anichstraße 35 6020 Innsbruck Austria