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  • The SI unit for radioactivity is the Becquerel (Bq)
  • 1 Bq = 1 atomic disintegration per second (dps)
  • 1 Bq = 2.7 x 10 -11 curie (Ci)
  • 1 Ci = 3.7 x 1010 Bq
  • 1 pCi/L = 1 x 10-9 m Ci/ml
  • The SI unit for radiation is the sievert (Sv)
  • 1 Sv = 100 rem
  • Common Prefixes for units
  • 10-3 = milli m
  • 10-6 = micro m
  • 10-9 = nano n
  • 10-12 = pico p
  • E.g., 1 picocurie (1 pCi) = 1 x 10-12 Ci