An Experimental Study of Electron Scattering in Electron Microscope Specimens

Abstract

Effective scattering cross sections for polystyrene in electron microscope specimens were measured through the microdensitometry of the images of polystyrene latex spheres recorded with an RCA Type EMU 3 B electron microscope.
Measurements were made at both 50kV and 100kV beam potential without an objective aperture, with a 40-micron aperture and with a 20-micron aperture. Cross sections per gram vary from 1.9 to 11×10⁴ cm²/gr. The results are consistent with previous experimental data and are in reasonable agreement with theoretical calculations.