He
Helium-8
Protons (Z)
2
Neutrons (N)
6
Mass number
8
Half-Life
119.5 ms
Abundance
---
Mass
8.034 u
Mass Excess
31,609.68 keV
Spin
0+
Discovered
1965
Binding energy per nucleon
3,925 keV
Neutron separation energy
2,535 keV
Proton separation energy
24,819 keV
Decay Mode
Decay chain
- HeHelium-8Z 2 · N 6119.5 ms
- β⁻83.1%
- β⁻α100%