Europium-152 (Eu-152)

Identity

Protons

63

Neutrons

89

Mass number

152

Mass

151.9 ± 1.3 u

Mass excess

-72.888 MeV

Spin

3-*

Stability

Half-life: 13.5 years

Natural occurrence

Not found in nature

Decays to

• positron emission 72.1 % → Sm-152
• beta minus 27.9 % → Gd-152