U.S. Code of Federal Regulations
Regulations most recently checked for updates: Sep 22, 2023
For the purposes of this part, activity is expressed in the special unit of curies (Ci) or in the SI unit of becquerels (Bq), or their multiples, or disintegrations (transformations) per unit of time.
(a) One becquerel = 1 disintegration per second (s
(b) One curie = 3.7 × 10