Nuclide reference
Co-58 — Cobalt-58
The half-life of Co-58 is 70.86 d. Main decay mode: β⁺ decay / electron capture to Fe-58 (100%).
Identification
- Element
- Cobalt (Co)
- Atomic number Z
- 27
- Mass number A
- 58
- State
- Radioactive
Key quantities
- Half-life
- 70.86 d
- Specific activity
- 1.176e+15 Bq/g
- Gamma constant Γ (H*(10))
- 0.154 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 154 µSv/h
- A1 / A2 for transport (SSR-6, НП-053-16)
- 1 TBq / 1 TBq
- D-value (НП-067-24)
- 0.07 TBq
Decay modes
- β⁺ decay / electron capture → Fe-58 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 810.759 | 99.45 |
| 510.999 · annihilation 511 keV | 29.8 |
| 6.403 · X-ray line | 15.19 |
| 6.39 · X-ray line | 7.752 |
| 863.951 | 0.6862 |
| 1,674.73 | 0.5171 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 474.84 | 14.9 |
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.Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².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.