Nuclide reference
Ir-189 — Iridium-189
Ir-189 की half-life 13.2 d है। मुख्य decay mode: electron capture → Os-189 (92.5%)।
Identification
- तत्व
- Iridium (Ir)
- Atomic number Z
- 77
- Mass number A
- 189
- State
- Radioactive
Key quantities
- Half-life
- 13.2 d
- विशिष्ट गतिविधि
- 1.937e+15 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 10 TBq / 10 TBq
- D-value (НП-067-24)
- 1 TBq
Decay modes
- electron capture → Os-189 — 92.5 %
- electron capture → Os-189m — 7.5 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 63 · X-ray line | 38.87 |
| 61.487 · X-ray line | 22.42 |
| 30.81 (Os-189m) | 7.64 |
| 245.08 | 6 |
| 69.528 | 3.54 |
| 59.05 | 1.2 |
| 36.17 | 0.672 |
| 275.89 | 0.54 |
| 219.4 | 0.528 |
| 216.68 | 0.516 |
Includes daughter nuclides in equilibrium: Os-189m (yield per decay of Ir-189); the emitting nuclide is in brackets. Equilibrium is reached in about 41 h.
Related calculators
इसी element के अन्य isotopes
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ 1 m पर H*(10) है, ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) से गणना की गई, equilibrium में short-lived progeny सहित (जैसे Cs-137/Ba-137m, Ra-226 series); specific activity molar mass M ≈ mass number A का उपयोग करती है।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.