Np
Neptunium-240
Protons (Z)
93
Neutrons (N)
147
Mass number
240
Half-Life
1.03 h
Abundance
---
Mass
240.056 u
Mass Excess
52,316.0 keV
Spin
(5+)
Discovered
1953
Binding energy per nucleon
7,550 keV
Neutron separation energy
5,066 keV
Proton separation energy
5,546 keV
Decay Mode
- β⁻→Plutonium-240100%
Decay chain
- NpNeptunium-240Z 93 · N 1471.03 h
- β⁻100%
- α~100%
- α~100%
- α~100%
- β⁻100%
- β⁻100%
- α~100%
- α~100%
- α100%
- α100%
- β⁻100%
- β⁻64.046%
- α100%