Abstract
The development of sophisticated radiation detector and the study of its energy and directional response require accurate excitation and ionisation cross sections for electrons as a function of energy and angle. However, there is a serious lack of accurate scattering cross sections for electrons of energies of less than a few keV, which usually make up the main body of secondary electrons. A procedure is described with which absolute differential cross sections for electron collision processes can be measured at low scattering angles. With this procedure, absolute differential cross sections for the 1'S®2'P transition in He are measured for electron energies from 0.6 to 2.0 keV at scattering angles of less than 1.0o. Furthermore, the differential cross sections for the 2P®3S transition in Ne are determined for energies from 1.0 to 2.0 keV in the small angle range.
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