Ra
Radium-215
Protons (Z)
88
Neutrons (N)
127
Mass number
215
Half-Life
1.67 ms
Abundance
---
Mass
215.003 u
Mass Excess
2,532.0 keV
Spin
(9/2+)
Discovered
1967
Binding energy per nucleon
7,739 keV
Neutron separation energy
5,632 keV
Proton separation energy
3,799 keV
Decay Mode
- α→Radon-211100%
Decay chain
- RaRadium-215Z 88 · N 1271.67 ms
- α100%
- β⁺72.6%
- EC58.2%
- α100%