Np
Neptunium-231
Protons (Z)
93
Neutrons (N)
138
Mass number
231
Half-Life
48.8 m
Abundance
---
Mass
231.038 u
Mass Excess
35,620.0 keV
Spin
(5/2+)
Discovered
1950
Binding energy per nucleon
7,602 keV
Neutron separation energy
7,691 keV
Proton separation energy
3,284 keV
Decay Mode
Decay chain
- NpNeptunium-231Z 93 · N 13848.8 m
- β⁺98%
- EC~100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%