Ac
Actinium
Z = 89 · Actinide · 227.0 u
Nuclear Engineering Significance
Ac-227 (t₁/₂ = 21.8 y) is produced in the thorium fuel cycle via Pa-231 decay. It is a significant contributor to the long-term radiotoxicity of thorium cycle spent fuel. Not used as a reactor material but must be tracked in thorium fuel cycle analyses.
Basic properties
- Atomic number (Z)
- 89
- Standard atomic mass
- 227.0 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.