Ra

Radium-215n

Protons (Z)

88

Neutrons (N)

127

Mass number

215

Half-Life

1.39 µs

Abundance

---

Mass

215.005 u

Mass Excess

4,779.0 keV

Spin

(29/2-)

Discovered

1998

Binding energy per nucleon

7,729 keV

Neutron separation energy

3,385 keV

Proton separation energy

1,552 keV

Decay Mode

γRadium-215100%

Decay chain

Radium-215Z 88 · N 1271.39 µs
γ100%
α100%
β⁺72.6%
EC58.2%
α100%