Ra

Radium-207m

Protons (Z)

88

Neutrons (N)

119

Mass number

207

Half-Life

57.0 ms

Abundance

---

Mass

207.004 u

Mass Excess

4,071.0 keV

Spin

13/2+

Discovered

1987

Binding energy per nucleon

7,719 keV

Neutron separation energy

7,566 keV

Proton separation energy

1,971 keV

Decay Mode

Decay chain

Radium-207Z 88 · N 11957.0 ms
γ85%
α86%
α66%
β⁺92.5%
β⁺100%
β⁺100%
β⁺100%