Nuclide reference
Lu-172 — Lutetium-172
The half-life of Lu-172 is 6.7 d. Main decay mode: β⁺ decay / electron capture to Yb-172 (100%).
Identification
- Element
- Lutetium (Lu)
- Atomic number Z
- 71
- Mass number A
- 172
- State
- Radioactive
Key quantities
- Half-life
- 6.7 d
- Specific activity
- 4.192e+15 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.6 TBq / 0.6 TBq
- D-value (НП-067-24)
- 0.04 TBq
Decay modes
- β⁺ decay / electron capture → Yb-172 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 1,093.63 | 62.5 |
| 52.389 · X-ray line | 55.79 |
| 51.355 · X-ray line | 30.75 |
| 900.724 | 29.81 |
| 181.525 | 20.56 |
| 810.064 | 16.63 |
| 912.079 | 15.25 |
| 78.7426 | 10.56 |
| 697.3 | 6.131 |
| 1,002.74 | 5.5 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 1,236 | 0.02 |
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.