Sb
Antimony-129m
Protons (Z)
51
Neutrons (N)
78
Mass number
129
Half-Life
17.7 m
Abundance
---
Mass
128.911 u
Mass Excess
-82,778.0 keV
Spin
19/2-
Discovered
1982
Binding energy per nucleon
8,404 keV
Neutron separation energy
6,219 keV
Proton separation energy
6,706 keV
Decay Mode
Decay chain
- SbAntimony-129Z 51 · N 7817.7 m
- β⁻85%
- β⁻100%
- β⁻100%