Nuclide reference
Ce-141 — Cerium-141
The half-life of Ce-141 is 32.508 d. Main decay mode: β⁻ decay to Pr-141 (100%).
Identification
- Element
- Cerium (Ce)
- Atomic number Z
- 58
- Mass number A
- 141
- State
- Radioactive
Key quantities
- Half-life
- 32.508 d
- Specific activity
- 1.054e+15 Bq/g
- Gamma constant Γ (H*(10))
- 0.01538 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 15.4 µSv/h
- A1 / A2 for transport (SSR-6, НП-053-16)
- 20 TBq / 0.6 TBq
- D-value (НП-067-24)
- 1 TBq
Decay modes
- β⁻ decay → Pr-141 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 145.443 | 48.29 |
| 36.026 · X-ray line | 8.882 |
| 35.55 · X-ray line | 4.864 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 435.36 | 69.7 |
| 580.8 | 30.3 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
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.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.