34th International Field Emission Symposium / 34ème Symposium International d'Emission de Champ
J. Phys. Colloques 48 (1987) C6-221-C6-226
DOI: 10.1051/jphyscol:1987636
THEORETICAL STUDY OF THE FIELD INDUCED DESORPTION
N. Shima et M. TsukadaDepartment of Physics, Faculty of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113, Japan
Abstract
A theory of the field induced desorption is proposed, which is valid for general cases between the adiabatic and the diabatic limit. The kinetic equation of the population is derived incorporating the mean first passage time to the ionized state. The rate of the field induced desorption is given by the sum of the relative level population devided by the mean first passage time. The mean first passage time is determined by the quantum mechanical procedure. The theory is applied to a simple one- dimensional model. The temperature dependence of the desorption rate showed a slight deviation from the Arrhenius like behavior, with the activation energy lying between the adiabatic and the diabatic limit.