TY - DATA T1 - (a) TDCS for the ionization of atomic hydrogen by 250 eV electron impact for θs = 8° as a function of the ejected electron angle θe relative to the incident electron direction PY - 2013/07/05 AU - C Dal Cappello AU - B Hmouda AU - A Naja AU - G Gasaneo UR - https://iop.figshare.com/articles/figure/_a_TDCS_for_the_ionization_of_atomic_hydrogen_by_250_eV_electron_impact_for_sub_em_s_em_sub_8_as_a_f/1012153 DO - 10.6084/m9.figshare.1012153.v1 L4 - https://ndownloader.figshare.com/files/1479975 KW - approximation KW - tdcs KW - BBK model KW - DWB 2 KW - ev KW - experiment KW - incident electron direction KW - ccc KW - electron energy KW - incident energy KW - ionization KW - Atomic Physics KW - Molecular Physics N2 - Figure 3. (a) TDCS for the ionization of atomic hydrogen by 250 eV electron impact for θs = 8° as a function of the ejected electron angle θe relative to the incident electron direction. The ejected electron energy is Ee = 5 eV. The results of the first Born approximation are represented by a dotted line, those of the second Born approximation by a full curve, those of the BBK model by a dashed line and experiments by squares. (b) Same as (a), but the results of the second Born approximation calculated by including all the contributions are represented by a full curve, those of the CDW-EIS by a dotted line, those of the CCC by a dashed line, those of the DWB2 by a dash–dotted line and experiments by squares. Abstract The second Born approximation is often used, particularly when we study double processes such as the ionization–excitation and the double ionization of atoms and molecules by charged particles. But when we apply this approximation, it needs the knowledge of all excited states of the target. In this study, we apply the second Born approximation by using 294 excited and pseudo-states for the ionization of atomic hydrogen by electrons. We compare the results of our model with those given by other models and to all experiments performed with an incident energy of 250 eV. We show that our new version of the second Born approximation gives better agreement than previous versions even for high values of the energy of the ejected electrons (50 eV). ER -