Sm
Samarium-137m
Protons (Z)
62
Neutrons (N)
75
Mass number
137
Half-Life
20.0 s
Abundance
---
Mass
136.927 u
Mass Excess
-67,890.0 keV
Spin
(1/2+)
Discovered
---
Binding energy per nucleon
8,213 keV
Neutron separation energy
9,150 keV
Proton separation energy
4,009 keV
Decay Mode
- β⁺→Promethium-137
Decay chain
- SmSamarium-137Z 62 · N 7520.0 s
- β⁺
- β⁺
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%