Energieverlust von Elektronen in Aluminium im Energiebereich 20 bis 60 MeV

Abstract

The energy spectrum of nearly monoenergetic electrons (energy width about 0.3%) was measured with a spectrometer of high resolution (about 0.1%) before and after passing through aluminum absorbers of thicknesses between 0.08 and 5.4 g/cm². The experiments were performed with the energy-analysed beam of the Darmstadt linear accelerator; the energy was varied between 20 and 60 MeV. The most probable energy losses agree with the theory ofSternheimer within the error limits (1.5−2%) for thicknesses smaller than 2 g/cm². The half widths are systematically larger than the values calculated byBlunck andWestphal.