curie
E647509
The curie is a large, non-SI unit of radioactivity historically used to quantify the intensity of radioactive sources, equal to 3.7 × 10¹⁰ disintegrations per second.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Curie (unit of radioactivity) | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
non-SI unit
ⓘ
unit of radioactivity ⓘ |
| belongsTo | radiation measurement units ⓘ |
| category | radioactivity unit ⓘ |
| classification | legacy radiological unit ⓘ |
| conversionFromBecquerel | divide by 3.7 × 10^10 ⓘ |
| conversionToBecquerel | multiply by 3.7 × 10^10 ⓘ |
| definition |
3.7 × 10^10 becquerels
ⓘ
3.7 × 10^10 disintegrations per second ⓘ |
| dimension | T^-1 ⓘ |
| hasLogarithmicRelation | none ⓘ |
| historicalDefinitionBasis | activity of 1 gram of radium-226 ⓘ |
| historicalUsage | widely used in 20th century nuclear science ⓘ |
| introducedBy | International Commission on Radiological Units NERFINISHED ⓘ |
| introducedInYear | 1910 ⓘ |
| measurementType | stochastic nuclear decay events per unit time ⓘ |
| namedAfter |
Marie Curie
NERFINISHED
ⓘ
Pierre Curie NERFINISHED ⓘ |
| notation | often written with capital C and lowercase i ⓘ |
| quantity | radioactivity ⓘ |
| regulatoryUse | still appears in some national regulations and industry standards ⓘ |
| relatedConcept |
dose rate
ⓘ
half-life ⓘ specific activity ⓘ |
| relatedUnit | becquerel NERFINISHED ⓘ |
| replacedBy | becquerel NERFINISHED ⓘ |
| safetyContext | used to characterize source strength for shielding design ⓘ |
| SIBaseUnitRelation | 1 Ci = 3.7 × 10^10 s^-1 ⓘ |
| SIUnitRelation | 1 Ci = 3.7 × 10^10 Bq ⓘ |
| status | non-SI unit accepted for use with SI in some contexts ⓘ |
| submultiple |
microcurie
ⓘ
millicurie ⓘ nanocurie ⓘ picocurie ⓘ |
| submultipleDefinition |
1 mCi = 10^-3 Ci
ⓘ
1 nCi = 10^-9 Ci ⓘ 1 pCi = 10^-12 Ci ⓘ 1 µCi = 10^-6 Ci ⓘ |
| symbol | Ci ⓘ |
| system | CGS-based radiological units ⓘ |
| usedFor |
specifying activity of radiopharmaceuticals
ⓘ
specifying activity of sealed radioactive sources ⓘ |
| usedInField |
health physics
ⓘ
nuclear engineering ⓘ nuclear medicine ⓘ radiation protection ⓘ radiology ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Curie (unit of radioactivity)