Ac

Actinium-218n

Protons (Z)

89

Neutrons (N)

129

Mass number

218

Half-Life

103.0 ns

Abundance

---

Mass

218.012 u

Mass Excess

11,460.0 keV

Spin

(11+)

Discovered

1994

Binding energy per nucleon

7,699 keV

Neutron separation energy

5,313 keV

Proton separation energy

1,719 keV

Decay Mode

γActinium-218100%

Decay chain

Actinium-218Z 89 · N 129103.0 ns
γ100%
α100%
α100%
β⁺99.825%
α100%