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. For full isotope data, see NNDC NuDat 3.