Nuclide reference
Eu-147 — Europium-147
The half-life of Eu-147 is 24.1 d. Main decay mode: β⁺ decay / electron capture to Sm-147 (100%).
Identification
- Element
- Europium (Eu)
- Atomic number Z
- 63
- Mass number A
- 147
- State
- Radioactive
Key quantities
- Half-life
- 24.1 d
- Specific activity
- 1.364e+15 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 2 TBq / 2 TBq
- D-value (НП-067-24)
- 0.2 TBq
Decay modes
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 40.119 · X-ray line | 51.73 |
| 39.524 · X-ray line | 28.51 |
| 197.299 | 24.4 |
| 121.22 | 21.23 |
| 677.516 | 9.003 |
| 1,077.04 | 5.685 |
| 601.45 | 5.417 |
| 798.729 | 4.465 |
| 955.832 | 3.538 |
| 933.005 | 3.172 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 699.6 | 0.21 |
| 578.39 | 0.127 | |
| 502.32 | 0.089 |
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.