Units of radioactivity

becquerel (Bq)

curie (Ci)

1 Bq = 1 decay/second

1 Ci = 3.7E + 10 Bq

Absorbed dose unit

gray (Gy)

1 Gy = 1 J/kg

Unit of dose equivalent of the absorbed

sievert (Sv)

1 Sv = 1 Gy∙WSB

WSB (Relative Biological Efficiency)

for β, γ, X WSB = 1

for α WSB = 20

Unit of dose rate for absorbed dose

1 Gy/s

1 Sv/s