This paper presents a classification of the processes of slow electron emission in solids when excited and stimulated in different ways. All these processes belong to the so‐called exoelectron emission (EEE). We examine phenomenological theories which explain the basic experimental evidence of the non‐stationary thermoemission (TEE). The EEE is described in terms of a kinetic theory close to luminescence theory. The experimental criteria suggested for distinguishing different types of exoelectron emission mechanisms can be used for any broad‐band emitters.

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Subject classification: 79.75.þg; S10On the basis of classification of exoelectron emission (EE) mechanisms we have proposed some experimental criteria for distinguishing these mechanisms: Bulk-surface criteria and the photon and low-energy electron excitation criterion. To illustrate the application of these criteria we have measured the influence of the precipation procedure on thermostimulated EE (TSEE) of CaSO 4 : Mn and the dependence of the TSEE and photostimulated EE (PSEE) intensity of CaSO 4 and MgO on exciting electron and photon energy.

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