La
Lanthanum-128
Protons (Z)
57
Neutrons (N)
71
Mass number
128
Half-Life
5.18 m
Abundance
---
Mass
127.916 u
Mass Excess
-78,630.0 keV
Spin
(5+)
Discovered
1961
Binding energy per nucleon
8,337 keV
Neutron separation energy
8,805 keV
Proton separation energy
3,101 keV
Decay Mode
- β⁺→Barium-128100%
Decay chain
- LaLanthanum-128Z 57 · N 715.18 m
- β⁺100%
- EC100%
- β⁺100%