Plutonium-238 (Pu-238)
Identity
- Protons
- 94
- Neutrons
- 144
- Mass number
- 238
- Mass
- 238.0 ± 1.2 u
- Mass excess
- 46.163 MeV
- Spin
- 0+
Stability
Half-life: 87.7 years
Natural occurrence
Not found in nature
Decays to
- alpha 100.0 % U-234
- spontaneous fission 1.9e-7 %