Tl

Thallium-189

Protons (Z)

81

Neutrons (N)

108

Mass number

189

Half-Life

2.3 m

Abundance

---

Mass

188.974 u

Mass Excess

-24,616.0 keV

Spin

1/2+

Discovered

1972

Binding energy per nucleon

7,866 keV

Neutron separation energy

10,351 keV

Proton separation energy

1,707 keV

Decay Mode

β⁺Mercury-189100%

Decay chain

Thallium-189Z 81 · N 1082.3 m
β⁺100%
β⁺100%
β⁺~100%
β⁺100%
EC100%