La
Lanthanum-124m
Protons (Z)
57
Neutrons (N)
67
Mass number
124
Half-Life
21.0 s
Abundance
---
Mass
123.925 u
Mass Excess
-70,160.0 keV
Spin
(2-)
Discovered
1992
Binding energy per nucleon
8,277 keV
Neutron separation energy
9,581 keV
Proton separation energy
1,794 keV
Decay Mode
- β⁺→Barium-124100%
Decay chain
- LaLanthanum-124Z 57 · N 6721.0 s
- β⁺100%
- β⁺100%
- β⁺100%