Nuclide reference
U-236 — Uranium-236
The half-life of U-236 is 23.42 million years. Main decay mode: α decay to Th-232 (100%).
Identification
- Element
- Uranium (U)
- Atomic number Z
- 92
- Mass number A
- 236
- State
- Radioactive
Key quantities
- Half-life
- 23.42 million years
- Specific activity
- 2,393,000 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 40 TBq / 0.006 TBq
- D-value (НП-067-24)
- 0.2 TBq
Decay modes
- α decay → Th-232 — 100 %
- spontaneous fission — 9e-8 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 16.1501 · X-ray line | 4.585 |
| 12.9598 · X-ray line | 3.755 |
| 49.46 | 0.078 |
| 112.79 | 0.0188 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| α | 4,494 | 73.8 |
| 4,445 | 25.9 | |
| 4,332 | 0.15 |
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.