Iron-55 (Fe-55)

Identity

Protons

26

Neutrons

29

Mass number

55

Mass

54.94 ± 0.33 u

Mass excess

-57.481 MeV

Spin

3/2-

Stability

Half-life: 2.76 years

Natural occurrence

Not found in nature

Decays to

• electron capture → Mn-55