Sm
Samarium-129
Protons (Z)
62
Neutrons (N)
67
Mass number
129
Half-Life
550.0 ms
Abundance
---
Mass
128.955 u
Mass Excess
-42,330.0 keV
Spin
(1/2+)
Discovered
1999
Binding energy per nucleon
8,023 keV
Neutron separation energy
11,251 keV
Proton separation energy
1,399 keV
Decay Mode
Decay chain
- SmSamarium-129Z 62 · N 67550.0 ms
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%