Nuclide reference
Fe-52 — Iron-52
The half-life of Fe-52 is 8.275 h. Main decay mode: β⁺ decay / electron capture to Mn-52m (100%).
Identification
- Element
- Iron (Fe)
- Atomic number Z
- 26
- Mass number A
- 52
- State
- Radioactive
Key quantities
- Half-life
- 8.275 h
- Specific activity
- 2.695e+17 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.3 TBq / 0.3 TBq
- D-value (НП-067-24)
- 0.02 TBq
Decay modes
- β⁺ decay / electron capture → Mn-52m — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 510.999 (Mn-52m) · annihilation 511 keV | 198.5 |
| 510.999 · annihilation 511 keV | 111 |
| 1,434.06 (Mn-52m) | 102.6 |
| 168.688 | 99.18 |
| 5.898 · X-ray line | 7.229 |
| 5.886 · X-ray line | 3.686 |
| 377.738 (Mn-52m) | 1.752 |
| 1,727.53 (Mn-52m) | 0.2257 |
| 1,039.93 | 0.09514 |
| 1,530.67 (Mn-52m) | 0.04823 |
Includes daughter nuclides in equilibrium: Mn-52m (yield per decay of Fe-52); the emitting nuclide is in brackets. Equilibrium is reached in about 2.6 h. In transient equilibrium a daughter's activity exceeds the parent's, so a yield can be above 100%.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 805.56 | 55.49 |
| 2,633.2 (Mn-52m) | 99.02 | |
| 905.52 (Mn-52m) | 0.1683 | |
| 1,102.5 (Mn-52m) | 0.03899 |
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.