Plutonium-240 (Pu-240)
Identity
- Protons
- 94
- Neutrons
- 146
- Mass number
- 240
- Mass
- 240.1 ± 1.2 u
- Mass excess
- 50.125 MeV
- Spin
- 0+
Stability
Half-life: 6561 years
Natural occurrence
Not found in nature
Decays to
- alpha 100.0 % U-236
- spontaneous fission 0.0000058 %