Terbium-156 (Tb-156)

Identity

Protons

65

Neutrons

91

Mass number

156

Mass

155.9 ± 4.0 u

Mass excess

-70.091 MeV

Spin

3-*

Stability

Half-life: 5.35 days

Natural occurrence

Not found in nature

Decays to

• positron emission → Gd-156