Symmetric scattering in electron and positron impact ionization of metastable 2s-state hydrogen atoms

Electron impact ionization of metastable 2P-state hydrogen atoms in the coplanar geometry

“…It is noted that the multiple scattering wave function [11] has been designed for two electrons moving in a coulomb field, which include higher order and correlation effects. Using this wave function, very interesting results for triple differential cross sections (TDCS) with various kinematic conditions have been obtained for electron hydrogen ionization collisions both in the ground state and metastable 2S state at non-relativistic energies [11,13,21,22] are not given here) as well as for medium-heavy atoms ionization by electrons at relativistic energies [23,24,32,33]. So it will be interesting here to use this wave function in the present study for ionization of metastable 2P state hydrogen atoms by electrons.…”

“…In such calculations, the ejected electron is detected in coincidence with the scattered electrons and it is a well known experiment [4]. This kind of experiment, called (e, 2e) experiments, have been successfully used during the last four decades to investigate the fine details of the ionization process both in the ground state [7][8][9][10][11][12][13][14][15][16] and metastable [17][18][19][20][21][22][23][24][25][26][27][28] states of atomic Hydrogen.…”

Ionization of Hydrogenic 3d State by Electron Impact

“…A multiple scattering principle [5] has been followed in the present study by 150 eV, 200 eV and 250 eV energies. The multiple scattering principle [5] plays a vital role in the study of hydrogenic ionization for ground state [14] and metastable states [15] and [18]- [21]. So, the present results seem to be interesting.…”

Computation of triple differential cross-sections with the inclusion of exchange effects in atomic K-shell ionization by relativistic electrons for symmetric geometry

“…It is also known that a non-relativistic description of the final electron is important. Das and Seal [1] have developed a wave function for electrons moving in Coulomb field which gives very interesting computational results for various kinematical conditions for both coplanar symmetric and asymmetric geometry in ionization of hydrogen atoms from 1S and 2S state for non-relativistic energies [12][13][14][15]. Recently, using the present theory of Das and Seal [1], multiplied with some spinors and without exchange term of Das [16], we computed the energy spectrum of scattered electrons in K-shell ionization of medium heavy atoms by relativistic electrons [17] which agree nicely with the experiment [11].…”