At
Astatine-201m
Protons (Z)
85
Neutrons (N)
116
Mass number
201
Half-Life
45.0 ms
Abundance
---
Mass
200.989 u
Mass Excess
-10,330.0 keV
Spin
1/2+
Discovered
2015
Binding energy per nucleon
7,792 keV
Neutron separation energy
9,413 keV
Proton separation energy
677 keV
Decay Mode
- γ→Astatine-201100%
Decay chain
- AtAstatine-201Z 85 · N 11645.0 ms
- γ100%
- α71%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%