Nuclide reference
Mn-56 — Manganese-56
The half-life of Mn-56 is 2.5789 h. Main decay mode: β⁻ decay to Fe-56 (100%).
Identification
- Element
- Manganese (Mn)
- Atomic number Z
- 25
- Mass number A
- 56
- State
- Radioactive
Key quantities
- Half-life
- 2.5789 h
- Specific activity
- 8.029e+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)
- 0.04 TBq
Decay modes
- β⁻ decay → Fe-56 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 846.754 | 98.87 |
| 1,810.72 | 27.19 |
| 2,113.05 | 14.34 |
| 2,522.88 | 0.9887 |
| 2,657.45 | 0.6525 |
| 2,959.77 | 0.3065 |
| 3,369.6 | 0.1681 |
| 1,238.26 | 0.09887 |
| 1,037.82 | 0.03955 |
| 2,598.4 | 0.01879 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 2,848.7 | 56.3 |
| 1,038 | 27.9 | |
| 735.65 | 14.6 | |
| 325.79 | 1.16 |
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.