Ra

Radium-213m

Protons (Z)

88

Neutrons (N)

125

Mass number

213

Half-Life

2.2 ms

Abundance

---

Mass

213.002 u

Mass Excess

2,114.0 keV

Spin

(17/2-)

Discovered

1976

Binding energy per nucleon

7,738 keV

Neutron separation energy

5,758 keV

Proton separation energy

1,659 keV

Decay Mode

Decay chain

Radium-213Z 88 · N 1252.2 ms
γ99%
α87%
β⁺83%
β⁺96.1%
α99.546%
EC100%