Tl

Thallium-197m

Protons (Z)

81

Neutrons (N)

116

Mass number

197

Half-Life

540.0 ms

Abundance

---

Mass

196.97 u

Mass Excess

-27,746.0 keV

Spin

9/2-

Discovered

1953

Binding energy per nucleon

7,890 keV

Neutron separation energy

8,320 keV

Proton separation energy

3,209 keV

Decay Mode

γThallium-197100%

Decay chain

Thallium-197Z 81 · N 116540.0 ms
γ100%
β⁺100%
EC100%