Ra
Radium-231
Protons (Z)
88
Neutrons (N)
143
Mass number
231
Half-Life
1.73 m
Abundance
---
Mass
231.041 u
Mass Excess
38,216.0 keV
Spin
(5/2+)
Discovered
1983
Binding energy per nucleon
7,608 keV
Neutron separation energy
4,371 keV
Proton separation energy
8,560 keV
Decay Mode
- β⁻→Actinium-231100%
Decay chain
- RaRadium-231Z 88 · N 1431.73 m
- β⁻100%
- β⁻100%
- β⁻100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%