Po

Polonium-204m

Protons (Z)

84

Neutrons (N)

120

Mass number

204

Half-Life

158.6 ns

Abundance

---

Mass

203.982 u

Mass Excess

-16,702.0 keV

Spin

8+

Discovered

1970

Binding energy per nucleon

7,831 keV

Neutron separation energy

7,462 keV

Proton separation energy

2,466 keV

Decay Mode

γPolonium-204100%

Decay chain

Polonium-204Z 84 · N 120158.6 ns
γ100%
β⁺99.33%
β⁺100%