La
Lanthanum-129
Protons (Z)
57
Neutrons (N)
72
Mass number
129
Half-Life
11.6 m
Abundance
---
Mass
128.913 u
Mass Excess
-81,324.0 keV
Spin
(3/2+)
Discovered
1963
Binding energy per nucleon
8,356 keV
Neutron separation energy
10,765 keV
Proton separation energy
3,244 keV
Decay Mode
- β⁺→Barium-129100%
Decay chain
- LaLanthanum-129Z 57 · N 7211.6 m
- β⁺100%
- β⁺100%
- β⁺100%