Ac
Actinium-228
Protons (Z)
89
Neutrons (N)
139
Mass number
228
Half-Life
6.15 h
Abundance
---
Mass
228.031 u
Mass Excess
28,894.7 keV
Spin
3+
Discovered
1908
Binding energy per nucleon
7,639 keV
Neutron separation energy
5,026 keV
Proton separation energy
5,572 keV
Decay Mode
- β⁻→Thorium-228100%
Decay chain
- AcActinium-228Z 89 · N 1396.15 h
- β⁻100%
- α~100%
- α~100%
- α100%
- α100%
- β⁻100%
- β⁻64.046%
- α100%