Ra
Radium-212m
Protons (Z)
88
Neutrons (N)
124
Mass number
212
Half-Life
9.3 µs
Abundance
---
Mass
212.002 u
Mass Excess
1,759.0 keV
Spin
8+
Discovered
1986
Binding energy per nucleon
7,738 keV
Neutron separation energy
7,144 keV
Proton separation energy
1,390 keV
Decay Mode
- γ→Radium-212100%
Decay chain
- RaRadium-212Z 88 · N 1249.3 µs
- γ100%
- α
- α62%
- β⁺99.33%
- β⁺100%