Nuclide reference
Pb-210 — Lead-210
The half-life of Pb-210 is 22.2 years. Main decay mode: β⁻ decay to Bi-210 (100%).
Identification
- Element
- Lead (Pb)
- Atomic number Z
- 82
- Mass number A
- 210
- State
- Radioactive
Key quantities
- Half-life
- 22.2 years
- Specific activity
- 2.837e+12 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 1 TBq / 0.05 TBq
- D-value (НП-067-24)
- 0.3 TBq
Decay modes
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 10.8277 · X-ray line | 12.62 |
| 13.005 · X-ray line | 9.801 |
| 46.539 | 4.454 |
Lines of the nuclide itself (ENDF/B-VIII.0).
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 5,304.3 (Po-210) | 101.8 |
| β⁻, E max | 16.961 | 84 |
| 63.5 | 16 | |
| 1,162.1 (Bi-210) | 100.1 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0. Includes daughter nuclides in equilibrium: Bi-210, Po-210 (yield per decay of Pb-210); the emitting nuclide is in brackets. Equilibrium is reached in about 2.7 years. In transient equilibrium a daughter's activity exceeds the parent's, so a yield can be above 100%.
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.