Isotopes of Thallium

Notable Isotopes

203Tl [122 neutrons]

Abundance: 29.524%

Stable with 122 neutrons

204Tl [123 neutrons]

Abundance: synthetic

Half life: 3.78 years [ beta- ]

Decay Energy: 0.764 MeV

Decays to 204Pb.

Half life: 3.78 years [ Electron Capture ]

Decay Energy: 0.374 MeV

Decays to 204Hg.

205Tl [124 neutrons]

Abundance: 70.476%

Stable with 124 neutrons