Tl
Thallium-209
Protons (Z)
81
Neutrons (N)
128
Mass number
209
Half-Life
2.16 m
Abundance
---
Mass
208.985 u
Mass Excess
-13,645.0 keV
Spin
1/2+
Discovered
1950
Binding energy per nucleon
7,833 keV
Neutron separation energy
4,966 keV
Proton separation energy
7,664 keV
Decay Mode
Decay chain
- TlThallium-209Z 81 · N 1282.16 m
- β⁻100%
- β⁻100%
- α100%