Nuclide reference
Cs-129 — Caesium-129
Cs-129 की half-life 1.3358 d है। मुख्य decay mode: β⁺ decay / electron capture → Xe-129 (100%)।
Identification
- तत्व
- Caesium (Cs)
- Atomic number Z
- 55
- Mass number A
- 129
- State
- Radioactive
Key quantities
- Half-life
- 1.3358 d
- विशिष्ट गतिविधि
- 2.804e+16 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 4 TBq / 4 TBq
- D-value (НП-067-24)
- 0.3 TBq
Decay modes
- β⁺ decay / electron capture → Xe-129 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 29.778 · X-ray line | 55.66 |
| 371.918 | 30.6 |
| 29.458 · X-ray line | 30.05 |
| 411.49 | 22.31 |
| 548.945 | 3.397 |
| 39.578 | 2.968 |
| 318.18 | 2.448 |
| 278.614 | 1.322 |
| 93.329 | 0.6518 |
| 588.549 | 0.6028 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
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.