Convert Rutherfords to Femtobecquerels
Convert Rutherfords (Rd) to Femtobecquerels (fBq) instantly and accurately.
Conversion Formula
fBq = Rd × 1.000000000e+21
About Rutherfords
The rutherford (Rd) equals exactly 10⁶ Bq = 1 MBq. Proposed by Ernest Rutherford and adopted at the 1946 Montreal Conference on Radioactivity as a convenient unit for large sources. Superseded by the MBq in SI but still encountered in older nuclear physics and reactor engineering literature. 1 Rd = 10⁶ Bq.
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.
Quick Reference Table
| Rutherfords (Rd) | Femtobecquerels (fBq) |
|---|---|
| 1 Rd | 1 × 1021 fBq |
| 2 Rd | 2 × 1021 fBq |
| 5 Rd | 5 × 1021 fBq |
| 10 Rd | 1 × 1022 fBq |
| 25 Rd | 2.5 × 1022 fBq |
| 50 Rd | 5 × 1022 fBq |
| 100 Rd | 1 × 1023 fBq |