Nuclide reference
Cf-248 — Californium-248
The half-life of Cf-248 is 333.5 d. Main decay mode: α decay to Cm-244 (100%).
Identification
- Element
- Californium (Cf)
- Atomic number Z
- 98
- Mass number A
- 248
- State
- Radioactive
Key quantities
- Half-life
- 333.5 d
- Specific activity
- 5.841e+13 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 40 TBq / 0.006 TBq
- D-value (НП-067-24)
- 0.1 TBq
Decay modes
- α decay → Cm-244 — 100 %
- spontaneous fission — 0.0029 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 15 · X-ray line | 7.927 |
| 99.383 | 0.0197 |
| 42.965 | 0.01903 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 6,258 | 80 |
| 6,217 | 19.6 | |
| 6,118 | 0.4 |
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.