1-17 keV positive ion-induced electron ejection from tungsten, molybdenum and vanadium

Abstract

Measurements have been made of secondary electron currents resulting from positive ion bombardment of clean (100) crystal targets of tungsten, molybdenum and vanadium, as well as polycrystalline tungsten, by a range of ions. Data from a relatively large number of bombarding ion species give support to Parilis and Kishinevskii's theory of kinetic electron ejection from metals (1960) and indicate the isotopic dependence of kinetic electron ejection, and that of the ejection coefficient and threshold velocities, on ion and target atom numbers.