Nuclide reference
Lu-174 — Lutetium-174
The half-life of Lu-174 is 3.31 years. Main decay mode: β⁺ decay / electron capture to Yb-174 (100%).
Identification
- Element
- Lutetium (Lu)
- Atomic number Z
- 71
- Mass number A
- 174
- State
- Radioactive
Key quantities
- Half-life
- 3.31 years
- Specific activity
- 2.297e+13 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 9 TBq / 9 TBq
- D-value (НП-067-24)
- 0.8 TBq
Decay modes
- β⁺ decay / electron capture → Yb-174 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 52.389 · X-ray line | 42.34 |
| 51.355 · X-ray line | 24.03 |
| 76.468 | 5.926 |
| 1,241.85 | 5.14 |
| 510.999 · annihilation 511 keV | 0.0454 |
| 1,318.3 | 0.03547 |
| 1,065.04 | 0.01645 |
| 176.653 | 0.01079 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 352 | 0.0152 |
For β⁺ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Other isotopes of this element
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.