Tl

Thallium-207m

Protons (Z)

81

Neutrons (N)

126

Mass number

207

Half-Life

1.33 s

Abundance

---

Mass

206.979 u

Mass Excess

-19,686.0 keV

Spin

11/2-

Discovered

1965

Binding energy per nucleon

7,860 keV

Neutron separation energy

5,504 keV

Proton separation energy

6,029 keV

Decay Mode

Decay chain

Thallium-207Z 81 · N 1261.33 s
γ100%
β⁻100%