Nuclide reference
Os-193 — Osmium-193
The half-life of Os-193 is 1.2546 d. Main decay mode: β⁻ decay to Ir-193 (99.67%).
Identification
- Element
- Osmium (Os)
- Atomic number Z
- 76
- Mass number A
- 193
- State
- Radioactive
Key quantities
- Half-life
- 1.2546 d
- Specific activity
- 1.995e+16 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 2 TBq / 0.6 TBq
- D-value (НП-067-24)
- 1 TBq
Decay modes
- β⁻ decay → Ir-193 — 99.67 %
- β⁻ decay → Ir-193m — 0.3335 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 64.896 · X-ray line | 5.533 |
| 9.16129 · X-ray line | 4.093 |
| 460.5 | 3.88 |
| 138.92 | 3.795 |
| 73.029 | 3.182 |
| 557.37 | 1.358 |
| 321.59 | 1.251 |
| 387.48 | 1.233 |
| 280.446 | 1.23 |
| 107.009 | 0.5626 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,141.2 | 57 |
| 1,068.2 | 18 | |
| 1,002.3 | 10.9 | |
| 680.66 | 7.74 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
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.