Rhenium-189 (Re-189)

Identity

Protons

75

Neutrons

114

Mass number

189

Mass

189.0 ± 8.8 u

Mass excess

-37.979 MeV

Spin

5/2+

Stability

Half-life: 1.01 days

Natural occurrence

Not found in nature

Decays to

• beta minus → Os-189