Thorium-231 (Th-231)
Identity
- Protons
- 90
- Neutrons
- 141
- Mass number
- 231
- Mass
- 231.0 ± 1.3 u
- Mass excess
- 33.816 MeV
- Spin
- 5/2+
Stability
Half-life: 1.06 days
Natural occurrence
Not found in nature
Decays to
- beta minus Pa-231
Half-life: 1.06 days
Not found in nature