Exoelectron Emission from Calcium Sulphate Excited by Slow Electrons

Classification of Exoelectron Emission Mechanisms

“…The criteria suggested can be used for any broad-band emitters. Thus, the application of this classification and these criteria to TSEE of MgO [6] and CaSO 4 [5] confirm the Auger mechanism for MgO peaks at 350 and 450 K and, on the contrary, for CaSO 4 the EEE excitation is provided by both the simple trapping of the primary electrons and the electrons of the electron±hole pairs. As an example of the mathematical treatment of EEE, we demonstrate the phenomenological theory of non-stationary thermoemission (TEE) in terms of luminescent kinetic theory.…”

“…All the observed REE mechanisms can be classified according to a) the location of electron storage (surface, bulk, adsorbed layer); b) the manner in which the electrons get energy for their exit into vacuum; c) the location where the electrons exit (the entire surface or locations with low electron affinity); etc. [5,6].…”

Kinetic modeling of the photo-stimulated exoelectron emission

“…(a) the location of electron storage (surface [6], bulk [7], adsorbed layer [8]); (b) the manner in which the electrons get energy for their exit into a vacuum [7, 9 −12]; (c) the location where the electrons exit, i.e. the entire surface or locations with low electron affinitysingular points (SP) [1,2].…”

The Experimental Criteria for Distinguishing Different Types of Exoelectron Emission Mechanisms

“…The EE excitation by slow electrons (SE) and VUV radiation can be applied not only to the study of the energy structure of solids [9][10][11], but also as a criterion allowing the division of the EE mechanism into three groups (at any rate, for broad-band dielectrics). The first group includes mechanisms which, under excitation, require the production of electron-hole pairs or pairs of complementary ion defects in the basic substance (e.g.…”

“…the entire surface or locations ("spots") with low electron affinity --singular points (SP); etc. [9,10].…”