Fr
Francium-213m
Protons (Z)
87
Neutrons (N)
126
Mass number
213
Half-Life
505.0 ns
Abundance
---
Mass
212.998 u
Mass Excess
-1,964.0 keV
Spin
21/2-
Discovered
1971
Binding energy per nucleon
7,761 keV
Neutron separation energy
6,519 keV
Proton separation energy
594 keV
Decay Mode
- γ→Francium-213100%
Decay chain
- FrFrancium-213Z 87 · N 126505.0 ns
- γ100%
- α99.44%
- β⁺96.1%
- α99.546%
- EC100%