untitled184 ∗ 1945 8 9 1 60 DS02 LSS( ) DS02 137Cs Ge 1975 30km 137Cs 1960 1945 1945 DS86 1987 1986 4 1) 1991 2 600m Glasstone and Dolan 3 100 100 1 X (Fireball) ∗ MARUYAMA Takashi, National Institute of Radiological Sciences; t_maru@fml.nirs.go.jp 185 20kt 500m 20kt 1.25 560m 20km 40 ( km) 40 100 m 200 m 10 100 m 30 m 10 m 100cm/sec 10cm/sec cm/sec 600m , 40 1991 1 m 2g/m3 BOUSSINESQ 186 1km2 1km 1km 0.2
