U
Uranium-221
Protons (Z)
92
Neutrons (N)
129
Mass number
221
Half-Life
660.0 ns
Abundance
---
Mass
221.026 u
Mass Excess
24,520.0 keV
Spin
(9/2+)
Discovered
2015
Binding energy per nucleon
7,635 keV
Neutron separation energy
6,561 keV
Proton separation energy
3,047 keV
Decay Mode
Decay chain
- UUranium-221Z 92 · N 129660.0 ns
- α100%
- α100%
- α87%
- β⁺83%
- β⁺96.1%
- α99.546%
- EC100%