Iridium-189 (Ir-189)

Identity

Protons

77

Neutrons

112

Mass number

189

Mass

189 ± 14 u

Mass excess

-38.450 MeV

Spin

3/2+*

Stability

Half-life: 13.2 days

Natural occurrence

Not found in nature

Decays to

• electron capture → Os-189