Er
Erbium-157m
Protons (Z)
68
Neutrons (N)
89
Mass number
157
Half-Life
76.0 ms
Abundance
---
Mass
156.932 u
Mass Excess
-63,259.0 keV
Spin
9/2+
Discovered
1971
Binding energy per nucleon
8,135 keV
Neutron separation energy
7,118 keV
Proton separation energy
5,008 keV
Decay Mode
- γ→Erbium-157100%
Decay chain
- ErErbium-157Z 68 · N 8976.0 ms
- γ100%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%