Cs

Caesium-138

Protons (Z)

55

Neutrons (N)

83

Mass number

138

Half-Life

33.5 m

Abundance

---

Mass

137.911 u

Mass Excess

-82,887.0 keV

Spin

3-

Discovered

1943

Binding energy per nucleon

8,360 keV

Neutron separation energy

4,413 keV

Proton separation energy

7,793 keV

Decay Mode

β⁻Barium-138100%

Decay chain

Caesium-138Z 55 · N 8333.5 m
β⁻100%