10 CFR 20.1005
§ 20.1005 Units of radioactivity.
United States · 10 CFR — Energy · Status: effective
Cite this
- Citation
- 10 CFR 20.1005, § 20.1005 Units of radioactivity, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/36484
- Permanent ID
ys:prov:36484@1- SHA-256
1a345cd2775592d8aa3b62c85912170f697d143a2cb8202a32c7c8ea963e9b4b
The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.
Full text
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−1).
(b) One curie = 3.7 × 10 10 disintegrations per second = 3.7 × 10 10 becquerels = 2.22 × 10 12 disintegrations per minute.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.