Er

Erbium-157

Protons (Z)

68

Neutrons (N)

89

Mass number

157

Half-Life

18.65 m

Abundance

---

Mass

156.932 u

Mass Excess

-63,414.0 keV

Spin

3/2-

Discovered

1966

Binding energy per nucleon

8,136 keV

Neutron separation energy

7,273 keV

Proton separation energy

5,163 keV

Decay Mode

β⁺Holmium-157100%

Decay chain

Erbium-157Z 68 · N 8918.65 m
β⁺100%
β⁺100%
β⁺100%
EC100%