Nuclide reference
O-20 — Oxygen-20
The half-life of O-20 is 13.51 s. Main decay mode: β⁻ decay to F-20 (100%).
Identification
- Element
- Oxygen (O)
- Atomic number Z
- 8
- Mass number A
- 20
- State
- Radioactive
Key quantities
- Half-life
- 13.51 s
- Specific activity
- 1.545e+21 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- β⁻ decay → F-20 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 1,056.78 | 99.98 |
| 3,488.13 | 0.0196 |
| 2,179.09 | 0.0025 |
| 1,309.17 | 0.0023 |
| 1,644.5 | 0.002 |
| 2,431.43 | 0.0019 |
| 1,843.74 | 0.0018 |
| 983.53 | 0.0011 |
| 2,504.54 | 0.001 |
| 656 | 0.0002 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 2,757.5 | 99.97 |
| 325.89 | 0.027 |
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.