Tl

Thallium-187m

Protons (Z)

81

Neutrons (N)

106

Mass number

187

Half-Life

15.6 s

Abundance

---

Mass

186.976 u

Mass Excess

-22,111.0 keV

Spin

9/2-

Discovered

1976

Binding energy per nucleon

7,851 keV

Neutron separation energy

10,299 keV

Proton separation energy

861 keV

Decay Mode

Decay chain

Thallium-187Z 81 · N 10615.6 s
α0.15%
β⁺99.45%
β⁺~100%
β⁺100%
β⁺100%
EC100%