Sm
Samarium-138
Protons (Z)
62
Neutrons (N)
76
Mass number
138
Half-Life
3.1 m
Abundance
---
Mass
137.923 u
Mass Excess
-71,498.0 keV
Spin
0+
Discovered
1982
Binding energy per nucleon
8,238 keV
Neutron separation energy
11,577 keV
Proton separation energy
4,714 keV
Decay Mode
- β⁺→Promethium-138100%
Decay chain
- SmSamarium-138Z 62 · N 763.1 m
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%