I

Iodine-138m

Protons (Z)

53

Neutrons (N)

85

Mass number

138

Half-Life

1.26 µs

Abundance

---

Mass

137.923 u

Mass Excess

-71,912.0 keV

Spin

(3-)

Discovered

2007

Binding energy per nucleon

8,292 keV

Neutron separation energy

3,627 keV

Proton separation energy

9,897 keV

Decay Mode

γIodine-138100%

Decay chain

Iodine-138Z 53 · N 851.26 µs
γ100%
β⁻94.67%
β⁻100%
β⁻100%