TY - DATA T1 - CVA ionization spectra for mathrm{H}_{2}^{+} in the forward condition from (a) 1sσ and R = 2 au, solid line; (b) 2pσ and R = 2 au, dotted line; (c) 1sσ and R = 1.4 au, dashed–dotted line PY - 2013/08/27 AU - R Della Picca AU - J Fiol AU - P D Fainstein UR - https://iop.figshare.com/articles/figure/_CVA_ionization_spectra_for_span_class_inline_eqn_span_class_tex_span_class_texImage_img_src_http_ej/1012674 DO - 10.6084/m9.figshare.1012674.v1 L4 - https://ndownloader.figshare.com/files/1480497 KW - target structure KW - term KW - laser parameters KW - laser pulse KW - cva KW - series expansion converges KW - ionization probability KW - electromagnetic field KW - Atomic Physics KW - Molecular Physics N2 - Figure 9. CVA ionization spectra for \mathrm{H}_{2}^{+} in the forward condition from (a) 1sσ and R = 2 au, solid line; (b) 2pσ and R = 2 au, dotted line; (c) 1sσ and R = 1.4 au, dashed–dotted line. The laser parameters are the same as used in figure 7. Curves (b) and (c) are shifted in energy. Abstract We present a detailed study of the ionization probability of H and H_{2}^{+} induced by a short intense laser pulse. Starting from a Coulomb–Volkov description of the process we derive a multipole-like expansion where each term is factored into two contributions: one that accounts for the effect of the electromagnetic field on the free-electron final state and a second factor that depends only on the target structure. Such a separation may be valuable to solve complex atomic or molecular systems as well as to interpret the dynamics of the process in simpler terms. We show that the series expansion converges rapidly, and thus the inclusion of the first few terms is sufficient to produce accurate results. ER -