Er

Erbium-149

Protons (Z)

68

Neutrons (N)

81

Mass number

149

Half-Life

4.0 s

Abundance

---

Mass

148.942 u

Mass Excess

-53,742.0 keV

Spin

(1/2+)

Discovered

1984

Binding energy per nucleon

8,075 keV

Neutron separation energy

10,334 keV

Proton separation energy

3,041 keV

Decay Mode

Decay chain

Erbium-149Z 68 · N 814.0 s
β⁺93%
β⁺100%
β⁺100%
β⁺83.3%
β⁺~100%
EC100%