Plutonium-237 (Pu-237)

Identity

Protons

94

Neutrons

143

Mass number

237

Mass

237.0 ± 1.8 u

Mass excess

45.092 MeV

Spin

7/2-

Stability

Half-life: 45.6 days

Natural occurrence

Not found in nature

Decays to

• electron capture 100.0 % → Np-237
• alpha 0.0042 % → U-233

Produced by

• Cm-241