BULK AND SURFACE ELECTRON-EMISSION INDUCED BY ION-BOMBARDMENT - METHODS OF OBSERVATION

It was found that the energy spectrum of secondary electrons emitted under ion bombardment of the cold (below 100 K) metal targets contains an additional maximum, the position of which on the energy scale depends on the ion incidence angle and the angle of electron detection. This maximum is also observed at room temperature but only at grazing exit angles. The additional maximum is supposed to be a result of the creation of electrons on the surface. Such electrons can be distinguished from the bulk electron emission at the special experimental arrangement (low target temperature and small exit angle of electrons).