2s → ns (n = 3, 4) excitation of hydrogen atom by positron and (or) electron impact

Abstract

Excitation of a hydrogen atom from its meta stable 2s to its 3s and 4s state in positron and (or) electron impact processes was investigated using Newton’s three-particle scattering equations. The effect of the second-order term was also investigated. The angle dependence of the differential cross section was studied at energies of 10 and 50 eV, respectively. Integrated cross sections are also reported in the energy region 10–200 eV. These are compared with other existing calculations.PACS No.: 36.10.Dr