Europium-149 (Eu-149)

Identity

Protons

63

Neutrons

86

Mass number

149

Mass

148.9 ± 4.2 u

Mass excess

-76.441 MeV

Spin

5/2+*

Stability

Half-life: 93.1 days

Natural occurrence

Not found in nature

Decays to

• electron capture → Sm-149

Produced by

• Gd-149