Convert Femtobecquerels to Curies
Convert Femtobecquerels (fBq) to Curies (Ci) instantly and accurately.
Conversion Formula
Ci = fBq × 2.702702703e-26
About Femtobecquerels
The femtobecquerel (fBq) equals 10⁻¹⁵ Bq, used in accelerator mass spectrometry (AMS) to quantify cosmogenic radionuclides (¹⁰Be, ³⁶Cl) in ice cores and geological samples. Ultra-low-background counting in deep underground laboratories reaches the fBq/kg level for solar neutrino detector purity assessment. 1 fBq = 10⁻¹⁵ Bq = 10⁻³ pBq.
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.
Quick Reference Table
| Femtobecquerels (fBq) | Curies (Ci) |
|---|---|
| 1 fBq | 2.703 × 10-26 Ci |
| 2 fBq | 5.405 × 10-26 Ci |
| 5 fBq | 1.351 × 10-25 Ci |
| 10 fBq | 2.703 × 10-25 Ci |
| 25 fBq | 6.757 × 10-25 Ci |
| 50 fBq | 1.351 × 10-24 Ci |
| 100 fBq | 2.703 × 10-24 Ci |