Units of Activity

For purposes of 105 CMR 120.000, activity is expressed in the SI unit of becquerel (Bq) or in the special unit of curie (Ci), or their multiples, or disintegrations or transformations per unit of time. (A) One becquerel (Bq) = 1 disintegration or transformation per second (dps or tps). (B) One curie (Ci) = 3.7 x 10 disintegrations or transformations per second (dps or tps) = 3.7 x 10 becquerel (Bq) = 2.22 x 10 disintegrations or transformations per minute (dpm or tpm). ENFORCEMENT