Ce
Cerium-139
Protons (Z)
58
Neutrons (N)
81
Mass number
139
Half-Life
137.64 d
Abundance
---
Mass
138.907 u
Mass Excess
-86,957.7 keV
Spin
3/2+
Discovered
1948
Binding energy per nucleon
8,370 keV
Neutron separation energy
7,463 keV
Proton separation energy
7,733 keV
Decay Mode
- EC→Lanthanum-139100%
Decay chain
- CeCerium-139Z 58 · N 81137.64 d
- EC100%