Mohsen Vafaee - Laser-Plasma Research Institute, Shahid Beheshti University, ۱۹۸۳۹۶۳۱۱۳, Tehran, Iran
Behnaz Buzari - Department of Chemistry, University of Isfahan, Isfahan ۸۱۷۴۶-۷۳۴۴۱, I. R. Iran

In this work, resonant strong field ionization of atomic hydrogen with respect to the 1s–2p transition as a two level system has been investigated. The calculation which starts from 1s state as the initial state and the coupling effects of the 1s and 2s states of the atomic hydrogen on the TES spectra have been studied. The norm of the residual electron and the individual population of these two states (1s, 2p) have been calculated instantaneously and represented. The oscillations of the population of these two states along by switch off and on of the electric laser field have been traced which show veryinteresting behaviours.