Artículos de revistas
Experimental determination of multiple ionization cross sections in Si by electron impact
Pérez, Pablo Daniel; Sepulveda Peñaloza, Andres Humberto; Castellano, Gustavo Eugenio; Trincavelli, Jorge Carlos; Experimental determination of multiple ionization cross sections in Si by electron impact; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 92; 6; 12-2015; 62708001-62708008
Pérez, Pablo Daniel
Sepulveda Peñaloza, Andres Humberto
Castellano, Gustavo Eugenio
Trincavelli, Jorge Carlos
The thin sample method is often used to experimentally determine ionization cross sections, especially when focusing on the low overvoltage region. The simplicity of the formalism involved in this method is very appealing, but some experimental complications arise in the preparation of thin films. In this work, a thick sample method was used to measure the Si-K x-ray production cross section by electron impact. The good agreement between the results obtained and the values reported in the literature validates the method and the parameters used. The advantages and disadvantages of the method are discussed and its application is extended to the determination of Si multiple-ionization cross sections, where the very low emission rates (around two orders of magnitude lower than the single-ionization case) make the use of the thin sample method impracticable.