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Excitation of 31,3 P and 31,3 D states of helium from the ground 11 S state by electrons and positrons

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Abstract

A systematic theoretical study is carried out for the electron and positron impact excitation of the 31,3 P and 31,3 D states of helium from the ground 11 S state. The results are reported for the differential cross sections, Stokes parameters and alignment and orientation parameters. To calculate the scattering amplitude which relate these parameters, a distorted wave approximation theory with different choices of distortion potential has been used. The results are compared with available theoretical and experimental data in the energy range of 40–100eV.

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Authors and Affiliations

  1. Department of Physics, University of Roorkee, 247667, Roorkee, India

    Surbhi Verma & Rajesh Srivastava

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  1. Surbhi Verma
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  2. Rajesh Srivastava
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Verma, S., Srivastava, R. Excitation of 31,3 P and 31,3 D states of helium from the ground 11 S state by electrons and positrons. Pramana - J Phys 50, 355–396 (1998). https://doi.org/10.1007/BF02847368

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  • DOI: https://doi.org/10.1007/BF02847368

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