Ac

Actinium-211

Protons (Z)

89

Neutrons (N)

122

Mass number

211

Half-Life

213.0 ms

Abundance

---

Mass

211.008 u

Mass Excess

7,140.0 keV

Spin

9/2-

Discovered

1968

Binding energy per nucleon

7,707 keV

Neutron separation energy

9,691 keV

Proton separation energy

592 keV

Decay Mode

Decay chain

Actinium-211Z 89 · N 122213.0 ms
α100%
α95%
β⁺69%
β⁺99.89%
β⁺100%
EC100%