Tl
Thallium-198m
Protons (Z)
81
Neutrons (N)
117
Mass number
198
Half-Life
1.87 h
Abundance
---
Mass
197.971 u
Mass Excess
-26,985.0 keV
Spin
7+
Discovered
1949
Binding energy per nucleon
7,888 keV
Neutron separation energy
6,702 keV
Proton separation energy
3,734 keV
Decay Mode
Decay chain
- TlThallium-198Z 81 · N 1171.87 h
- β⁺55.9%