%0 Journal Article
%T C¨¢lculo da taxa de ioniza£¿£¿o por campo de um ¨¢tomo pr¨®ximo a uma superf¨ªcie met¨¢lica: aplica£¿£¿o ao microsc¨®pio i£¿nico de campo
%A Silva
%A Ariel Almeida Abreu
%A Andrade-Neto
%A A.V.
%J Revista Brasileira de Ensino de F¨ªsica
%D 2012
%I Scientific Electronic Library Online
%R 10.1590/S1806-11172012000100004
%X in this work we calculate the ionization rate constant (ionization probability per unit of time) as a function of the applied field (we assume a uniform field) and the atom's distance from the metal surface. in order to calculate the probability of barrier penetration we use semiclassical (wkb)approximation. we utilize one-dimensional model potential which is chosen to be a good physical representation of the real system. in addition, the field ion microscope is approached in a elementary way.
%K field ionization
%K field ion microscopy
%K wkb approximation.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1806-11172012000100004&lng=en&nrm=iso&tlng=en