Tl

Thallium-201m

Protons (Z)

81

Neutrons (N)

120

Mass number

201

Half-Life

2.01 ms

Abundance

---

Mass

200.972 u

Mass Excess

-26,262.0 keV

Spin

9/2-

Discovered

1962

Binding energy per nucleon

7,887 keV

Neutron separation energy

7,286 keV

Proton separation energy

4,048 keV

Decay Mode

γThallium-201100%

Decay chain

Thallium-201Z 81 · N 1202.01 ms
γ100%
EC100%