Er

Erbium-169

Protons (Z)

68

Neutrons (N)

101

Mass number

169

Half-Life

9.39 d

Abundance

---

Mass

168.935 u

Mass Excess

-60,921.2 keV

Spin

1/2-

Discovered

1956

Binding energy per nucleon

8,117 keV

Neutron separation energy

6,003 keV

Proton separation energy

8,150 keV

Decay Mode

β⁻Thulium-169100%

Decay chain

Erbium-169Z 68 · N 1019.39 d
β⁻100%