Nuclide reference
Cm-242 — Curium-242
The half-life of Cm-242 is 162.94 d. Main decay mode: α decay to Pu-238 (100%).
Identification
- Element
- Curium (Cm)
- Atomic number Z
- 96
- Mass number A
- 242
- State
- Radioactive
Key quantities
- Half-life
- 162.94 d
- Specific activity
- 1.225e+14 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 40 TBq / 0.01 TBq
- D-value (НП-067-24)
- 0.04 TBq
Decay modes
- α decay → Pu-238 — 100 %
- spontaneous fission — 0.0000061 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 18.1429 · X-ray line | 4.851 |
| 14.2738 · X-ray line | 4.385 |
| 44.08 | 0.03294 |
| 101.93 | 0.002591 |
| 157.42 | 0.001442 |
| 561.02 | 0.00015 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 6,112.7 | 74.08 |
| 6,069.4 | 25.92 | |
| 5,969.2 | 0.035 |
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.