Gd
Gadolinium-138m
Protons (Z)
64
Neutrons (N)
74
Mass number
138
Half-Life
6.2 µs
Abundance
---
Mass
137.943 u
Mass Excess
-53,430.0 keV
Spin
(8-)
Discovered
1997
Binding energy per nucleon
8,096 keV
Neutron separation energy
10,291 keV
Proton separation energy
573 keV
Decay Mode
- γ→Gadolinium-138100%
Decay chain
- GdGadolinium-138Z 64 · N 746.2 µs
- γ100%
- β⁺100%
- β⁺
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%