Np
Neptunium-235
Protons (Z)
93
Neutrons (N)
142
Mass number
235
Half-Life
1.08 y
Abundance
---
Mass
235.044 u
Mass Excess
41,043.0 keV
Spin
5/2+
Discovered
1949
Binding energy per nucleon
7,587 keV
Neutron separation energy
6,983 keV
Proton separation energy
4,391 keV
Decay Mode
Decay chain
- NpNeptunium-235Z 93 · N 1421.08 y
- EC99.997%
- α~100%
- β⁻100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%