Er
Erbium-149m
Protons (Z)
68
Neutrons (N)
81
Mass number
149
Half-Life
8.9 s
Abundance
---
Mass
148.943 u
Mass Excess
-53,000.0 keV
Spin
(11/2-)
Discovered
1984
Binding energy per nucleon
8,070 keV
Neutron separation energy
9,592 keV
Proton separation energy
2,299 keV
Decay Mode
Decay chain
- ErErbium-149Z 68 · N 818.9 s
- β⁺96.32%
- β⁺100%
- β⁺100%
- β⁺83.3%
- β⁺~100%
- EC100%