Nuclide reference
Yb-169 — Ytterbium-169
Yb-169 की half-life 32.018 d है। मुख्य decay mode: electron capture → Tm-169 (100%)।
Identification
- तत्व
- Ytterbium (Yb)
- Atomic number Z
- 70
- Mass number A
- 169
- State
- Radioactive
Key quantities
- Half-life
- 32.018 d
- विशिष्ट गतिविधि
- 8.929e+14 Bq/g
- Gamma constant Γ (H*(10))
- 0.07082 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 70.8 µSv/h
- परिवहन के लिए A1 / A2 (SSR-6)
- 4 TBq / 1 TBq
- D-value (НП-067-24)
- 0.3 TBq
Decay modes
- electron capture → Tm-169 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 50.742 · X-ray line | 93.27 |
| 49.774 · X-ray line | 52.76 |
| 63.1204 | 43.62 |
| 197.957 | 35.93 |
| 177.213 | 22.28 |
| 109.779 | 17.39 |
| 130.523 | 11.38 |
| 307.736 | 10.05 |
| 93.6145 | 2.58 |
| 118.189 | 1.874 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
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 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।Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².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.