Nuclide reference
Eu-155 — Europium-155
Eu-155 की half-life 4.753 years है। मुख्य decay mode: β⁻ decay → Gd-155 (100%)।
Identification
- तत्व
- Europium (Eu)
- Atomic number Z
- 63
- Mass number A
- 155
- State
- Radioactive
Key quantities
- Half-life
- 4.753 years
- विशिष्ट गतिविधि
- 1.795e+13 Bq/g
- Gamma constant Γ (H*(10))
- 0.0132 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 13.2 µSv/h
- परिवहन के लिए A1 / A2 (SSR-6)
- 20 TBq / 3 TBq
- D-value (НП-067-24)
- 2 TBq
Decay modes
- β⁻ decay → Gd-155 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 86.5479 | 30.7 |
| 105.308 | 21.12 |
| 42.997 · X-ray line | 11.97 |
| 42.31 · X-ray line | 6.659 |
| 45.299 | 1.311 |
| 60.0086 | 1.216 |
| 26.531 | 0.3162 |
| 86.0591 | 0.1535 |
| 57.989 | 0.06662 |
| 146.071 | 0.05096 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 147.59 | 47 |
| 166.35 | 25 | |
| 252.9 | 16.7 | |
| 192.89 | 9 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
इसी element के अन्य isotopes
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ 1 m पर H*(10) है, ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) से गणना की गई, equilibrium में short-lived progeny सहित (जैसे Cs-137/Ba-137m, Ra-226 series); specific activity molar mass M ≈ mass number A का उपयोग करती है।Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².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.