Xe

Xenon-139

Protons (Z)

54

Neutrons (N)

85

Mass number

139

Half-Life

39.68 s

Abundance

---

Mass

138.919 u

Mass Excess

-75,644.6 keV

Spin

3/2-

Discovered

1951

Binding energy per nucleon

8,312 keV

Neutron separation energy

3,744 keV

Proton separation energy

10,954 keV

Decay Mode

β⁻Caesium-139100%

Decay chain

Xenon-139Z 54 · N 8539.68 s
β⁻100%
β⁻100%
β⁻100%