Gadolinium-149 (Gd-149)

Identity

Protons

64

Neutrons

85

Mass number

149

Mass

148.9 ± 3.6 u

Mass excess

-75.127 MeV

Spin

7/2-*

Stability

Half-life: 9.28 days

Natural occurrence

Not found in nature

Decays to

• positron emission 100.0 % → Eu-149
• alpha 0.00043 % → Sm-145