Ac
Actinium-209
Protons (Z)
89
Neutrons (N)
120
Mass number
209
Half-Life
94.0 ms
Abundance
---
Mass
209.009 u
Mass Excess
8,840.0 keV
Spin
9/2-
Discovered
1968
Binding energy per nucleon
7,696 keV
Neutron separation energy
9,991 keV
Proton separation energy
177 keV
Decay Mode
Decay chain
- AcActinium-209Z 89 · N 12094.0 ms
- α100%
- α98.5%
- α71%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%