Nuclide reference
Bi-214 — Bismuth-214
The half-life of Bi-214 is 19.9 min. Main decay mode: β⁻ decay to Po-214 (99.98%).
Identification
- Element
- Bismuth (Bi)
- Atomic number Z
- 83
- Mass number A
- 214
- State
- Radioactive
Key quantities
- Half-life
- 19.9 min
- Specific activity
- 1.634e+18 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 609.32 | 45.49 |
| 1,764.49 | 15.3 |
| 1,120.29 | 14.92 |
| 1,238.12 | 5.834 |
| 2,204.06 | 4.924 |
| 768.36 | 4.894 |
| 1,377.67 | 3.988 |
| 934.056 | 3.107 |
| 1,729.6 | 2.878 |
| 1,407.99 | 2.394 |
Lines of the nuclide itself (ENDF/B-VIII.0).
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 5,452 | 0.01132 |
| 7,686.8 (Po-214) | 99.97 | |
| 6,902.2 (Po-214) | 0.0104 | |
| β⁻, E max | 3,270 | 19.1 |
| 1,540.4 | 17.57 | |
| 1,505.5 | 16.96 | |
| 1,422.6 | 8.14 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0. Includes daughter nuclides in equilibrium: Po-214 (yield per decay of Bi-214); the emitting nuclide is in brackets. Equilibrium is reached in about 9.7 min.
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.