Actinium-227 (Ac-227)
Identity
- Protons
- 89
- Neutrons
- 138
- Mass number
- 227
- Mass
- 227.0 ± 2.1 u
- Mass excess
- 25.850 MeV
- Spin
- 3/2-*
Stability
Half-life: 21.8 years
Natural occurrence
Not found in nature
Decays to
- beta minus 98.6 % Th-227
- alpha 1.4 % Fr-223 (no page)