In
Indium-121m
Protons (Z)
49
Neutrons (N)
72
Mass number
121
Half-Life
3.88 m
Abundance
---
Mass
120.908 u
Mass Excess
-85,521.0 keV
Spin
1/2-
Discovered
1974
Binding energy per nucleon
8,461 keV
Neutron separation energy
7,862 keV
Proton separation energy
8,853 keV
Decay Mode
Decay chain
- InIndium-121Z 49 · N 723.88 m
- β⁻98.8%
- β⁻100%