At
Astatine-198m
Protons (Z)
85
Neutrons (N)
113
Mass number
198
Half-Life
1.23 s
Abundance
---
Mass
197.993 u
Mass Excess
-6,442.0 keV
Spin
10-
Discovered
1967
Binding energy per nucleon
7,768 keV
Neutron separation energy
8,158 keV
Proton separation energy
338 keV
Decay Mode
Decay chain
- AtAstatine-198Z 85 · N 1131.23 s
- α93%
- β⁺~100%
- β⁺~100%
- β⁺100%
- EC100%
- β⁺100%