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Hyperfine Interactions

, Volume 89, Issue 1, pp 469–476 | Cite as

Electron and positron impact excitation of hydrogen from the initially excited 22S state to 32S and 32P states

  • Surbhi Verma
  • Rajesh Srivastava
Contributed Papers Session 10. Positronium and Antihydrogen

Abstract

The total and differential cross sections for the electron and positron impact excitation of hydrogen from its initially excited metastable 22S state to 32S and 32P states are reported. A distorted-wave approximation theory is used for the calculation. The angular correlation parametersλ, 〈Ly〉 and alignment angleγ are also reported for 22S-32P excitation. For comparison, similar first Born results are also obtained. Interesting features are noted on comparing our distorted wave results with the first Born results as well as with the other available results forn2S andn2P (n=2,3) excitations from the ground 12S state of hydrogen.

Keywords

Hydrogen Thin Film Differential Cross Section Approximation Theory Differential Cross 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • Surbhi Verma
    • 1
  • Rajesh Srivastava
    • 1
  1. 1.Department of PhysicsUniversity of RoorkeeRoorkeeIndia

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