Californium-251 (Cf-251)

Identity

Protons

98

Neutrons

153

Mass number

251

Mass

251.1 ± 4.2 u

Mass excess

74.135 MeV

Spin

1/2+

Stability

Half-life: 898 years

Natural occurrence

Not found in nature

Decays to

• alpha → Cm-247

Produced by

• Es-251