Abstract
We measured the electron-penetration depths for layers of ZnS particles by stacking ZnS-phosphor material on another phosphor layer, that were the two-layered structure with varying the thickness and particle diameter of the upper layer, at a low excitation voltages. Additionally, we calculated the penetration depths by Monte Carlo simulation with varied values for density of the ZnS-particle layer. The measured penetration depths varied with the particle diameter and were much deeper than the calculated depths. The layer densities in calculation had to be reduced to fit the results to the measured values. The depths of electron-penetration into ZnS-particle layers were affected by density fluctuations.
