At
Astatine-203
Protons (Z)
85
Neutrons (N)
118
Mass number
203
Half-Life
7.4 m
Abundance
---
Mass
202.987 u
Mass Excess
-12,163.0 keV
Spin
9/2-
Discovered
1951
Binding energy per nucleon
7,804 keV
Neutron separation energy
9,639 keV
Proton separation energy
1,510 keV
Decay Mode
Decay chain
- AtAstatine-203Z 85 · N 1187.4 m
- β⁺69%
- β⁺99.89%
- β⁺100%
- EC100%