Gd
Gadolinium-139
Protons (Z)
64
Neutrons (N)
75
Mass number
139
Half-Life
5.7 s
Abundance
---
Mass
138.938 u
Mass Excess
-57,630.0 keV
Spin
(9/2-)
Discovered
1983
Binding energy per nucleon
8,126 keV
Neutron separation energy
10,041 keV
Proton separation energy
3,169 keV
Decay Mode
Decay chain
- GdGadolinium-139Z 64 · N 755.7 s
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%