Neptunium-236 (Np-236)

Identity

Protons

93

Neutrons

143

Mass number

236

Mass

236 ± 54 u

Mass excess

43.378 MeV

Spin

(6-)

Stability

Half-life: 1.53 × 10⁵ years

Natural occurrence

Not found in nature

Decays to

• electron capture 86.3 % → U-236
• beta minus 13.5 % → Pu-236
• alpha 0.16 % → Pa-232

Produced by

• Am-240