Cobalt-58 (Co-58)

Identity

Protons

27

Neutrons

31

Mass number

58

Mass

57.9 ± 1.2 u

Mass excess

-59.847 MeV

Spin

2+*

Stability

Half-life: 70.8 days

Natural occurrence

Not found in nature

Decays to

• electron capture 85.2 % → Fe-58
• positron emission 14.8 % → Fe-58