U
Uranium-231
Protons (Z)
92
Neutrons (N)
139
Mass number
231
Half-Life
4.2 d
Abundance
---
Mass
231.036 u
Mass Excess
33,806.0 keV
Spin
(5/2+)
Discovered
1949
Binding energy per nucleon
7,613 keV
Neutron separation energy
5,880 keV
Proton separation energy
5,657 keV
Decay Mode
Decay chain
- UUranium-231Z 92 · N 1394.2 d
- EC~100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%