Experimental determination of H2 mass stopping powers for low-energy electrons

Abstract

We present experimental mass stopping powers of electrons in gaseous H2 obtained with a newly developed electron time-of-flight spectrometer, for the incident electron energy range of 11 eV to 25 eV. In our procedure the average energy loss is derived from conversion of measured electron time-of-flight spectra into equivalent electron energy loss spectra. Our present results are compared with the only available experimental measurement and with theoretical models. The measurements are of a significant improvement to the available experimental data to date.