Ac

Actinium-219

Protons (Z)

89

Neutrons (N)

130

Mass number

219

Half-Life

9.4 µs

Abundance

---

Mass

219.012 u

Mass Excess

11,570.0 keV

Spin

9/2-

Discovered

1970

Binding energy per nucleon

7,701 keV

Neutron separation energy

7,351 keV

Proton separation energy

2,365 keV

Decay Mode

Decay chain

Actinium-219Z 89 · N 1309.4 µs
α100%
α100%
EC58.2%
α100%