Nuclide reference
W-181 — Tungsten-181
W-181 की half-life 121.2 d है। मुख्य decay mode: electron capture → Ta-181 (100%)।
Identification
- तत्व
- Tungsten (W)
- Atomic number Z
- 74
- Mass number A
- 181
- State
- Radioactive
Key quantities
- Half-life
- 121.2 d
- विशिष्ट गतिविधि
- 2.202e+14 Bq/g
- Gamma constant Γ
- —
- परिवहन के लिए A1 / A2 (SSR-6)
- 30 TBq / 30 TBq
- D-value (НП-067-24)
- 5 TBq
Decay modes
- electron capture → Ta-181 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 57.534 · X-ray line | 33.09 |
| 56.279 · X-ray line | 18.99 |
| 6.24 | 1.03 |
| 152.32 | 0.083 |
| 136.28 | 0.0311 |
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।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.