Nuclide reference
Fe-60 — Iron-60
The half-life of Fe-60 is 1.5 million years. Main decay mode: β⁻ decay to Co-60m (100%).
Identification
- Element
- Iron (Fe)
- Atomic number Z
- 26
- Mass number A
- 60
- State
- Radioactive
Key quantities
- Half-life
- 1.5 million years
- Specific activity
- 147,000,000 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 40 TBq / 0.2 TBq
- D-value (НП-067-24)
- 0.06 TBq
Decay modes
- β⁻ decay → Co-60m — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 6.93 (Co-60m) · X-ray line | 17.97 |
| 6.914 (Co-60m) · X-ray line | 9.162 |
| 58.603 (Co-60m) | 2.067 |
| 1,332.5 (Co-60m) | 0.24 |
Includes daughter nuclides in equilibrium: Co-60m (yield per decay of Fe-60); the emitting nuclide is in brackets. Equilibrium is reached in about 1.2 h.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 178.4 | 100 |
| 1,549.7 (Co-60m) | 0.2299 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Other isotopes of this element
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.