Code of Massachusetts Regulations
105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 120.000 - The Control of Radiation
Section 120.015 - Units of Activity

Universal Citation: 105 MA Code of Regs 105.120

Current through Register 1531, September 27, 2024

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 1010 disintegrations or transformations per second (dps or tps) = 3.7 x 1010 becquerel (Bq) = 2.22 x 1012 disintegrations or transformations per minute (dpm or tpm).

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