Abstract
Angular distribution of emitted X-rays from thick Pb and Cu targets bombarded by 15–33 MeV electrons have been measured with an ETL type quantameter whose sensitivity is almost energy-independent in the energy range above 3 MeV. To reduce the directional dependence of self-absorption in the target, 270° sector-type targets were used and their pivot was bombarded by electrons. No pronounced dip at 90° was observed in the angular distribution curve. The distribution curve for unit electron beam energy rises with increasing electron energy at angles smaller than 70°. However, the distribution curve at angles from 30–107° shows an energy independent and intrinsic shape for each target material at energies higher than 25 MeV.
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