Convert Curies to Disintegrations per minute
Convert Curies (Ci) to Disintegrations per minute (dpm) instantly and accurately.
Conversion Formula
dpm = Ci × 2220000000000
About Curies
The curie (Ci) equals exactly 3.7 × 10¹⁰ Bq = 37 GBq, originally defined as the activity of 1 g of ²²⁶Ra. Still widely used in the US: ⁶⁰Co teletherapy sources are 5000-15000 Ci; ¹³⁷Cs blood irradiators are 1000-40000 Ci; NRC source licences for industrial radiography cite Ci limits. 1 Ci = 3.7 × 10¹⁰ Bq.
About Disintegrations per minute
The disintegration per minute (dpm) equals exactly 1/60 Bq ≈ 16.7 mBq. Standard output unit of liquid scintillation counters (LSC) in biochemical and biomedical research for ³H and ¹⁴C tracer assays; radioimmunoassay protocols report results in dpm/well. 1 dpm = 1/60 Bq = 60 dph.
Quick Reference Table
| Curies (Ci) | Disintegrations per minute (dpm) |
|---|---|
| 1 Ci | 2.22 × 1012 dpm |
| 2 Ci | 4.44 × 1012 dpm |
| 5 Ci | 1.11 × 1013 dpm |
| 10 Ci | 2.22 × 1013 dpm |
| 25 Ci | 5.55 × 1013 dpm |
| 50 Ci | 1.11 × 1014 dpm |
| 100 Ci | 2.22 × 1014 dpm |