At
Astatine-200m
Protons (Z)
85
Neutrons (N)
115
Mass number
200
Half-Life
47.0 s
Abundance
---
Mass
199.99 u
Mass Excess
-8,875.0 keV
Spin
(7+)
Discovered
1967
Binding energy per nucleon
7,783 keV
Neutron separation energy
8,123 keV
Proton separation energy
925 keV
Decay Mode
Decay chain
- AtAstatine-200Z 85 · N 11547.0 s
- β⁺57%
- β⁺88.9%
- β⁺100%
- EC100%
- β⁺100%