Fr
Francium-201m
Protons (Z)
87
Neutrons (N)
114
Mass number
201
Half-Life
24.0 ms
Abundance
---
Mass
201.004 u
Mass Excess
3,718.0 keV
Spin
1/2+
Discovered
2005
Binding energy per nucleon
7,714 keV
Neutron separation energy
10,483 keV
Proton separation energy
-429 keV
Decay Mode
- α→Astatine-197100%
Decay chain
- FrFrancium-201Z 87 · N 11424.0 ms
- α100%
- α96.1%
- β⁺96.5%
- β⁺
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%