Nuclide reference
Cm-241 — Curium-241
The half-life of Cm-241 is 32.8 d. Main decay mode: electron capture to Am-241 (99%).
Identification
- Element
- Curium (Cm)
- Atomic number Z
- 96
- Mass number A
- 241
- State
- Radioactive
Key quantities
- Half-life
- 32.8 d
- Specific activity
- 6.112e+14 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 2 TBq / 1 TBq
- D-value (НП-067-24)
- 0.1 TBq
Decay modes
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 471.805 | 70.67 |
| 14.6134 · X-ray line | 40.35 |
| 18.4951 · X-ray line | 37.67 |
| 430.634 | 4.063 |
| 132.413 | 3.199 |
| 205.879 | 2.676 |
| 165.049 | 2.583 |
| 265.922 | 2.442 |
| 636.88 | 1.536 |
| 463.273 | 1.225 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 5,939 | 0.689 |
| 5,927.2 | 0.181 | |
| 5,884.7 | 0.118 |
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.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.