Ac

Actinium-220

Protons (Z)

89

Neutrons (N)

131

Mass number

220

Half-Life

26.36 ms

Abundance

---

Mass

220.015 u

Mass Excess

13,744.0 keV

Spin

(3-)

Discovered

1970

Binding energy per nucleon

7,692 keV

Neutron separation energy

5,897 keV

Proton separation energy

2,939 keV

Decay Mode

Decay chain

Actinium-220Z 89 · N 13126.36 ms
α100%
α100%
α100%
β⁺100%