Np
Neptunium-220
Protons (Z)
93
Neutrons (N)
127
Mass number
220
Half-Life
29.0 ns
Abundance
---
Mass
220.033 u
Mass Excess
30,480.0 keV
Spin
(1-)
Discovered
2019
Binding energy per nucleon
7,602 keV
Neutron separation energy
7,031 keV
Proton separation energy
105 keV
Decay Mode
- α→Protactinium-216100%
Decay chain
- NpNeptunium-220Z 93 · N 12729.0 ns
- α100%
- α100%
- α100%
- α89%
- β⁺96.2%
- β⁺99.33%
- β⁺100%