A model for the calculation of secondary electron energy distributions due to bombardment of an amorphous surface by electrons is presented. It takes into account the possibilities of reflexion and tunneling at the surface potential barrier. The general shape of the energy distributions obtained are compared with some typical experimental data. The advantages of the expression obtained for the secondary electron energy distribution are its simplicity and the fact that it can fit the experimental data of a great number of different materials, thus rendering it useful in calculations relating to electron multipliers or other secondary emission devices.
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