I
Iodine-138
Protons (Z)
53
Neutrons (N)
85
Mass number
138
Half-Life
6.26 s
Abundance
---
Mass
137.923 u
Mass Excess
-71,980.0 keV
Spin
(1-)
Discovered
1949
Binding energy per nucleon
8,292 keV
Neutron separation energy
3,695 keV
Proton separation energy
9,965 keV
Decay Mode
Decay chain
- IIodine-138Z 53 · N 856.26 s
- β⁻94.67%
- β⁻100%
- β⁻100%