Nuclide reference
Cf-250 — Californium-250
The half-life of Cf-250 is 13.08 years. Main decay mode: α decay to Cm-246 (99.92%).
Identification
- Element
- Californium (Cf)
- Atomic number Z
- 98
- Mass number A
- 250
- State
- Radioactive
Key quantities
- Half-life
- 13.08 years
- Specific activity
- 4.045e+12 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 20 TBq / 0.002 TBq
- D-value (НП-067-24)
- 0.1 TBq
Decay modes
- α decay → Cm-246 — 99.92 %
- spontaneous fission — 0.077 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 19.2249 · X-ray line | 3.042 |
| 14.9559 · X-ray line | 2.698 |
| 99.2 | 0.01517 |
| 42.852 | 0.01435 |
| 152.9 | 0.002573 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 6,030.2 | 84.63 |
| 5,988.9 | 14.99 | |
| 5,891 | 0.2998 |
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.