Abstract
The solution by Markoff of the random flight problem is applied to the calculation of an electron energy distribution. This distribution develops in a gas when a homogeneous constant electric field is present. The electron-electron interaction is neglected and some other classical conditions are supposed to be fulfilled. The introduction of a so called energy-orientation space makes it possible to describe changes in energy and direction of the electron in geometric terms. It is also possible to take into account the elastic losses and by doing so a stationary electron energy distribution is obtained. From the result it can be seen that the form of the exponential factor in the Druyvesteyn distribution can be interpreted as to originate from a combination of diffusion and elastic friction in the energy-orientation space.
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