Rhenium-186 (Re-186)

Identity

Protons

75

Neutrons

111

Mass number

186

Mass

185.95 ± 0.88 u

Mass excess

-41.927 MeV

Spin

1-*

Stability

Half-life: 3.72 days

Natural occurrence

Not found in nature

Decays to

• beta minus 92.5 % → Os-186
• electron capture 7.5 % → W-186