Fr

Francium-211m

Protons (Z)

87

Neutrons (N)

124

Mass number

211

Half-Life

146.0 ns

Abundance

---

Mass

210.998 u

Mass Excess

-1,717.0 keV

Spin

29/2+

Discovered

1986

Binding energy per nucleon

7,757 keV

Neutron separation energy

6,444 keV

Proton separation energy

-599 keV

Decay Mode

γFrancium-211100%

Decay chain

Francium-211Z 87 · N 124146.0 ns
γ100%
α87%
β⁺90%
β⁺~100%
β⁺100%