Ra
Radium-231m
Protons (Z)
88
Neutrons (N)
143
Mass number
231
Half-Life
---
Abundance
---
Mass
231.041 u
Mass Excess
38,282.0 keV
Spin
(1/2+)
Discovered
2001
Binding energy per nucleon
7,608 keV
Neutron separation energy
4,305 keV
Proton separation energy
8,494 keV
Decay Mode
- γ→Radium-231100%
Decay chain
- RaRadium-231Z 88 · N 143Unknown
- γ100%
- β⁻100%
- β⁻100%
- β⁻100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%