Ra
Radium-229
Protons (Z)
88
Neutrons (N)
141
Mass number
229
Half-Life
4.0 m
Abundance
---
Mass
229.035 u
Mass Excess
32,562.0 keV
Spin
5/2+
Discovered
1975
Binding energy per nucleon
7,628 keV
Neutron separation energy
4,450 keV
Proton separation energy
8,111 keV
Decay Mode
- β⁻→Actinium-229100%
Decay chain
- RaRadium-229Z 88 · N 1414.0 m
- β⁻100%
- β⁻100%
- α100%
- β⁻100%
- α~100%
- α~100%
- α99.992%
- β⁻97.91%
- α100%
- β⁻100%
- α100%