Es
Einsteinium
Z = 99 · Actinide · 252.0 u
Nuclear Engineering Significance
Transuranic element produced in minute quantities in high-flux reactors. Es-254 (t₁/₂ = 275.7 d) has a significant spontaneous fission rate. Not significant in commercial reactor operations.
Basic properties
- Atomic number (Z)
- 99
- Standard atomic mass
- 252.0 u
- Category
- Actinide
Isotopes & cross-section data
No nuclide data for this element in the reference database.
The NRDP database focuses on nuclides relevant to reactor physics (fuels, moderators, structural materials, fission products, etc.). For full isotope data, see NNDC NuDat 3 or IAEA Nuclear Data Services.