Manganese-54 (Mn-54)

Identity

Protons

25

Neutrons

29

Mass number

54

Mass

53.9 ± 1.1 u

Mass excess

-55.558 MeV

Spin

3+*

Stability

Half-life: 312 days

Natural occurrence

Not found in nature

Decays to

• electron capture 100.0 % → Cr-54
• beta minus 0.000093 % → Fe-54
• positron emission 1.3e-7 % → Cr-54