Pu
Plutonium-221
Protons (Z)
94
Neutrons (N)
127
Mass number
221
Half-Life
100.0 µs
Abundance
---
Mass
221.039 u
Mass Excess
35,930.0 keV
Spin
(9/2+)
Discovered
---
Binding energy per nucleon
7,576 keV
Neutron separation energy
---
Proton separation energy
1,839 keV
Decay Mode
- α→Uranium-217
- SF
Decay chain
- PuPlutonium-221Z 94 · N 127100.0 µs
- α
- α100%
- α100%
- α100%
- β⁺75.4%
- β⁺90%
- β⁺99.96%
- β⁺100%
- EC100%