Some results of the airborne high energy resolution gamma-spectrometry application for the research of the USSR European territory radioactive contamination in 1986 caused by the Chernobyl accident

The main results of the investigation of the European part of the (former) USSR radiation contamination in summer 1986 after Chernobyl accident using MEPhI airborne high energy resolution gamma-spectrometry system are presented. The results of research are presented as the surface activity density distribution maps for 131I, 132Te,95Zr + 95Nb, 103Ru, 106Ru, 140Ba+ 140La, 141Ce, 134Cs, 137Cs for the significant part of the USSR European territory.