Tl
Thallium-201
Protons (Z)
81
Neutrons (N)
120
Mass number
201
Half-Life
3.04 d
Abundance
---
Mass
200.971 u
Mass Excess
-27,181.0 keV
Spin
1/2+
Discovered
1950
Binding energy per nucleon
7,891 keV
Neutron separation energy
8,205 keV
Proton separation energy
4,967 keV
Decay Mode
- EC→Mercury-201100%
Decay chain
- TlThallium-201Z 81 · N 1203.04 d
- EC100%