Tb
Terbium-139
Protons (Z)
65
Neutrons (N)
74
Mass number
139
Half-Life
1.6 s
Abundance
---
Mass
138.948 u
Mass Excess
-48,130.0 keV
Spin
(5/2-)
Discovered
1999
Binding energy per nucleon
8,052 keV
Neutron separation energy
12,601 keV
Proton separation energy
-241 keV
Decay Mode
Decay chain
- TbTerbium-139Z 65 · N 741.6 s
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%