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 (fuels, moderators, structural materials, fission products, etc.). For full isotope data, see NNDC NuDat 3 or IAEA Nuclear Data Services.