Nuclide reference
Dy-166 — Dysprosium-166
The half-life of Dy-166 is 3.4 d. Main decay mode: β⁻ decay to Ho-166 (100%).
Identification
- Element
- Dysprosium (Dy)
- Atomic number Z
- 66
- Mass number A
- 166
- State
- Radioactive
Key quantities
- Half-life
- 3.4 d
- Specific activity
- 8.56e+15 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.9 TBq / 0.3 TBq
- D-value (НП-067-24)
- 1 TBq
Decay modes
- β⁻ decay → Ho-166 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 47.548 · X-ray line | 25.59 |
| 46.701 · X-ray line | 13.97 |
| 82.47 | 13.8 |
| 28.227 | 1.132 |
| 54.239 | 0.8142 |
| 425.99 | 0.5796 |
| 371.75 | 0.5244 |
| 343.51 | 0.0552 |
| 290.66 | 0.0138 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 404.43 | 97 |
| 432.66 | 5 | |
| 486.9 | 2 | |
| 60.913 | 1.17 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
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 is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.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.