Tl

Thallium-197

Protons (Z)

81

Neutrons (N)

116

Mass number

197

Half-Life

2.84 h

Abundance

---

Mass

196.97 u

Mass Excess

-28,354.0 keV

Spin

1/2+

Discovered

1955

Binding energy per nucleon

7,894 keV

Neutron separation energy

8,928 keV

Proton separation energy

3,817 keV

Decay Mode

β⁺Mercury-197100%

Decay chain

Thallium-197Z 81 · N 1162.84 h
β⁺100%
EC100%