Observation of gamma-rays from fallout collected at Ibaraki, Japan, during the Fukushima nuclear accident

► Gamma-ray spectra were analyzed for a fallout sample of Fukushima accident origin. ► Te, I, Cs, 110mAg, 125Sb, 140Ba, 140La, etc. were found in the fallout. ► Deposition densities of 137Cs during March 2011 was at least 1.4×104 Bq m−2 at Ibaraki. ► Approximately 14% of 137Cs fallout was attributed to rainout.