Fast and Slow Electrons in Liquid Neon

Muon spin relaxation measurements in liquid neon in electric fields up to 35 kV/cm reveal two types of radiolysis electrons created in the positive muon's ionization track. Some of these electrons are initially delocalized (fast) and reach the ${\mu }^{+}$ to form a muonium atom before they can become localized (slow) inside bubbles. Fast and slow electrons have similar initial spatial distributions relative to the thermalized muon.