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


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.


Hydrogen Thin Film Differential Cross Section Approximation Theory Differential Cross 
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  1. [1]
    S. Trajmar and J.C. Nickel, Adv. At. Mol. Phys. 30 (1992) 45.Google Scholar
  2. [2]
    M.P. Scott and P.G. Burke, J. Phys. B 26 (1993) L191.Google Scholar
  3. [3]
    E.J. Mansky and M.R. Flannery, J. Phys. B 25 (1992) 1591.Google Scholar
  4. [4]
    I. Khuarna, R. Srivastava and A.N. Tripathi, J. Phys. B 20 (1987) 3515.Google Scholar
  5. [5]
    K.C. Mathur, R.P. McEachran, L.A. Parcell and A.D. Stauffer, J. Phys. B 20 (1987) 1599.Google Scholar
  6. [6]
    L.G. Christophorou and E. Illenberger, Phys. Lett. A 173 (1993) 78.Google Scholar
  7. [7]
    A.K. Katiyar and R. Srivastava, Phys. Rev. A 38 (1988) 2767.Google Scholar
  8. [8]
    L.A. Vainshtein, Opt. Spectry. (USSR) 11 (1961) 163.Google Scholar
  9. [9]
    P.G. Burke, in:Proc. (Invited Talks) 18 th Int. Conf. Phys. Elect. Atom. Coll. (ICPEAC), Aarhus 1993, eds. T. Andersen, B. Fastrup, F. Folkman, H. Knudsen and N. Andersen (Am. Inst. of Physics, New York, 1993).Google Scholar
  10. [10]
    A.K. Katiyar and R. Srivastava, J. Phys. B 20 (1987) L821.Google Scholar
  11. [11]
    A.K. Katiyar and R. Srivastava, Phys. Rev. A 30 (1989) 1289.Google Scholar
  12. [12]
    J.B. Furness and I.E. McCarthy, J. Phys. B 6 (1973) 2280.Google Scholar
  13. [13]
    S. Vučič, R.M. Potvliege and C.J. Joachain, J. Phys. B 20 (1987) 3157.Google Scholar
  14. [14]
    K. Bartschat and D.H. Madison, J. Phys. B 20 (1987) 5839.Google Scholar
  15. [15]
    N. Andersen, J.W. Gallagher and I.V. Hertel, Phys. Rep. 165 (1988) 1.Google Scholar
  16. [16]
    E.J. Mansky, in:Nonequilibrium Processes in Partially Ionized Gases, eds. M. Capitelli and J.N. Bardsley (Plenum Press, New York, 1990) p. 349.Google Scholar
  17. [17]
    V.E. Bubelev and D.H. Madison, J. Phys. B 25 (1992) 3229.Google Scholar
  18. [18]
    K. Bartschat, R.P. McEachran and A.D. Stauffer,Proc. 17th Int. Conf. Phys. Elec. Atom. Coll. (ICPEAC), 1991, eds. I.E. McCarthy, W.R. MacGillivray and M.C. Standage (Griffith University, Australia) p. 343.Google Scholar
  19. [19]
    W.C. Fon, K.A. Berrington and A.E. Kingston, J. Phys. B 13 (1980) 2309.Google Scholar

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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