Dose reduction efficiencies of gamma radiation in cloud or deposited radioactivity from the Fukushima Prefecture.

Means ± S.E. of dose reduction efficiencies of wooden, aluminum, and reinforced concrete buildings were calculated 4 times on different days at 1 site, 15 times on different days at 3 sites, and 56 times on different days at 14 sites during March–July 2011.
aP<0.05 vs aluminum building and reinforced concrete construction by Tukey–Kramer's test.