Europium-154 (Eu-154)

Identity

Protons

63

Neutrons

91

Mass number

154

Mass

153.9 ± 1.3 u

Mass excess

-71.738 MeV

Spin

3-*

Stability

Half-life: 8.59 years

Natural occurrence

Not found in nature

Decays to

• beta minus 100.0 % → Gd-154
• electron capture 0.018 % → Sm-154