Promethium-147 (Pm-147)

Identity

Protons

61

Neutrons

86

Mass number

147

Mass

146.9 ± 1.4 u

Mass excess

-79.042 MeV

Spin

7/2+*

Stability

Half-life: 2.62 years

Natural occurrence

Not found in nature

Decays to

• beta minus → Sm-147

Produced by

• Nd-147
• Eu-151