Il Nuovo Cimento D

, Volume 16, Issue 6, pp 571–583 | Cite as

Ionization of metastable H(2S) atom by electron and positron impact

  • R. Biswas
  • C. Sinha
Article

Summary

Triple differential cross-section (TDCS) of hydrogen atom in its metastable (2S) state is studied theoretically by electron and positron impact for coplanar and asymmetric geometry. The final-state wave function in the present model satisfies the asymptotic boundary condition for asymmetric geometry (i.e. fork 1k 2). In the absence of experiment, present results are compared with other existing theoretical results. Apart from the double-peaked structure of the TDCS as in ground-state ionization, some interesting secondary structures are found, in conformity with other theories for ionization from 2S state.

PACS 34.80.Dp

Atomic excitation and ionization by electron impact 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    S. Trajmar andJ. C. Nickel:Advances in Atomic, Molecular and Optical Physics, edited by SirD. Bates Vol.30 (Academic Press, Inc. 1992), p. 45.Google Scholar
  2. [2]
    P. Defrance, W. Claeys, A. Cornet andG. Poulaert:J. Phys. B,14, 111 (1981); see also other references cited therein.CrossRefADSGoogle Scholar
  3. [3]
    S. Vucic, R. M. Potvliege andC. J. Joachain:Phys. Rev. A,35, 1446 (1987).CrossRefADSGoogle Scholar
  4. [4]
    H. Hafid, B. Joulakian andC. Dal Cappello:J. Phys. B,26, 3415 (1993).CrossRefADSGoogle Scholar
  5. [5]
    C. Sinha andS. Tripathi:J. Phys. B,24, 3659 (1991).CrossRefADSGoogle Scholar
  6. [6]
    C. Sinha andS. Tripathi:J. Phys. B,26, 185 (1993).CrossRefADSGoogle Scholar
  7. [7]
    M. Brauner, J. S. Briggs andH. Klar:J. Phys. B,22, 2265 (1989).CrossRefADSGoogle Scholar
  8. [8]
    F. W. Byron jr.,C. J. Joachain andB. Piraux:J. Phys. B,18, 3203 (1985).CrossRefADSGoogle Scholar
  9. [9]
    R. R. Lewis jr.:Phys. Rev.,102, 537 (1956).MATHCrossRefADSGoogle Scholar
  10. [10]
    C. Sinha andN. C. Sil:J. Phys. B,11, L333 (1978).CrossRefADSGoogle Scholar
  11. [11]
    C. Sinha, S. Tripathi andN. C. Sil:Phys. Rev. A,34, 1026 (1986).CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica 1994

Authors and Affiliations

  • R. Biswas
    • 1
  • C. Sinha
    • 1
  1. 1.Indian Association for the Cultivation of ScienceJadavpur, CalcuttaIndia

Personalised recommendations