Nuclide reference
Eu-148 — Europium-148
The half-life of Eu-148 is 54.5 d. Main decay mode: β⁺ decay / electron capture to Sm-148 (100%).
Identification
- Element
- Europium (Eu)
- Atomic number Z
- 63
- Mass number A
- 148
- State
- Radioactive
Key quantities
- Half-life
- 54.5 d
- Specific activity
- 5.99e+14 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.5 TBq / 0.5 TBq
- D-value (НП-067-24)
- 0.03 TBq
Decay modes
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 550.284 | 98.5 |
| 629.987 | 71.9 |
| 40.119 · X-ray line | 41.62 |
| 39.524 · X-ray line | 22.94 |
| 611.293 | 20.49 |
| 553.231 | 12.94 |
| 725.673 | 12.65 |
| 414.028 | 10.28 |
| 414.057 | 10.07 |
| 571.962 | 9.563 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁺, E max | 833.74 | 0.09 |
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.