Calculations of Triple Differential Cross-Sections for the Ionization of H (3S) by Electron Impact

Abstract

In the present study we have calculated the Triple Differential Cross-Sections (TDCS) for the ionization of metastable 3S-state hydrogen atoms at 250 eV incidence electron energy for various kinematic conditions in the asymmetric coplanar geometry. A final state wave function of multiple scattering theory [11] has been used in the present study. The present results show a good qualitative agreement with the existing hydrogenic ground state experimental data and various related theoretical results. Some results of hydrogenic metastable states are also presented here for comparisons. However there is no existing theoretical and experimental works on hydrogenic metastable 3S-state except an existing theoretical first born result of Vu ǐ ̌ et al. [19].

Triple Differential Cross-Sections for Ionization of H(3d) by Incident Electron

“…In Figure 2(a), our present results show a good agreement with 2S-state [18] and 3S -state [27] metastable results The present TDCS curve display two fall and two peak in recoil region and one fall two peak in binary region while metastable 3S-state result exhibit one fall and one peak in recoil region and one peak in binary region. The present results and 2S-state results show one prominent peak in recoil region.…”

“…In Figure 2(b), our present study results exhibit same peak pattern with metastable 3S -state [27] and 2S-state [18] results whereas the present results and metastable 3P -state results [29] show opposite peak pattern at higher ejected angle about 1 288 θ =  . In Figure 2(c), our present TDCS curve depict a very interesting results.…”

“…It expressed two falls in recoil region and two peak in binary region. The present result is closer to the 3S-state result [27]. The present result shows a bit different from 3P state results [29].…”

“…In Figure 1(b), the peak value of present and first Born results are lower than the hydrogenic ground state experimental results [2], hydrogenic metastable 3P-state results [29] and hydrogenic metastable 3S-state results [27]. Also the peak values shifted slightly to the higher ejected angle near about 1 72 θ =  .…”

“…Also the earlier works on hydrogenic 2S-state [18], 3S-state [27] and recent works on hydrogenic 3P-state [29] ionization results are exhi-  is referred as binary region. In Figure 1(a), the present results shows a qualitative comparison with the present first Born result (black), the hydrogenic ground state result of BBK model [11], the second Born approximation [16], the hydrogenic ground state experimental data [2], 3S-state results [27] and recent works on hydrogenic 3P-state [29] Here in the recoil region the peak values of present and first Born and 3P-state results [29] are about double results of the other compared results. The binary peak values of the present results slightly shifted right from other compared results.…”