Ac
Actinium-208m
Protons (Z)
89
Neutrons (N)
119
Mass number
208
Half-Life
28.0 ms
Abundance
---
Mass
208.012 u
Mass Excess
11,258.0 keV
Spin
10-
Discovered
1994
Binding energy per nucleon
7,682 keV
Neutron separation energy
7,963 keV
Proton separation energy
-459 keV
Decay Mode
Decay chain
- AcActinium-208Z 89 · N 11928.0 ms
- α100%
- α96%
- α52%
- β⁺~100%
- β⁺~100%
- β⁺100%