La
Lanthanum-142m
Protons (Z)
57
Neutrons (N)
85
Mass number
142
Half-Life
870.0 ns
Abundance
---
Mass
141.914 u
Mass Excess
-79,878.0 keV
Spin
(4-)
Discovered
1983
Binding energy per nucleon
8,320 keV
Neutron separation energy
5,019 keV
Proton separation energy
7,435 keV
Decay Mode
- γ→Lanthanum-142100%
Decay chain
- LaLanthanum-142Z 57 · N 85870.0 ns
- γ100%
- β⁻100%