At
Astatine-199n
Protons (Z)
85
Neutrons (N)
114
Mass number
199
Half-Life
70.0 ns
Abundance
---
Mass
198.991 u
Mass Excess
-8,250.0 keV
Spin
13/2+
Discovered
2000
Binding energy per nucleon
7,779 keV
Neutron separation energy
9,612 keV
Proton separation energy
66 keV
Decay Mode
- γ→Astatine-199100%
Decay chain
- AtAstatine-199Z 85 · N 11470.0 ns
- γ100%
- α89%
- β⁺~100%
- β⁺100%
- β⁺100%
- β⁺100%
- EC100%