Nuclide reference
Pb-202 — Lead-202
Pb-202 की half-life 52,500 years है। मुख्य decay mode: electron capture → Tl-202 (100%)।
Identification
- तत्व
- Lead (Pb)
- Atomic number Z
- 82
- Mass number A
- 202
- State
- Radioactive
Key quantities
- Half-life
- 52,500 years
- विशिष्ट गतिविधि
- 1.247e+9 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 40 TBq / 20 TBq
- D-value (НП-067-24)
- 0.2 TBq
Decay modes
- electron capture → Tl-202 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 439.51 (Tl-202) | 91.5 |
| 70.819 (Tl-202) · X-ray line | 38.89 |
| 68.894 (Tl-202) · X-ray line | 22.83 |
| 520.3 (Tl-202) | 0.5856 |
| 960.1 (Tl-202) | 0.06863 |
Includes daughter nuclides in equilibrium: Tl-202 (yield per decay of Pb-202); the emitting nuclide is in brackets. Equilibrium is reached in about 86 d.
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.