Thulium-167 (Tm-167)

Identity

Protons

69

Neutrons

98

Mass number

167

Mass

166.9 ± 1.4 u

Mass excess

-62.543 MeV

Spin

1/2+*

Stability

Half-life: 9.25 days

Natural occurrence

Not found in nature

Decays to

• electron capture → Er-167