Plasma-screening effects in the astrophysically relevant He-like and Li-like Mg and Fe ions*

Regular Article
Part of the following topical collections:
  1. Topical Issue: Low-Energy Interactions related to Atmospheric and Extreme Conditions

Abstract

The effect of plasma environment on the atomic energy levels of He-like and Li-like Mg and Fe ions have been studied using Debye model. The equation-of-motion coupled-cluster (EOMCC) and Fock-space coupled-cluster (FSCC) formalisms in the relativistic frame work have been adopted to describe the atomic states and the energy levels of the above plasma embedded ions. Salient features of these methods have been described to account the two electron screening effects through the Debye potentials. The two-body screening potential has been derived in the multipole expansion form to evaluate the reduced matrix elements in solving the equation of motion. Using this extended model, we have also predicted that quasi-degeneracy among the energy states having same principal quantum number (n) but different angular momentum (l) is slacken, whereas fine structure splitting is unaffected with increasing plasma strength. These knowledge are useful in estimating radiative opacity, photoionization cross sections, line intensities, etc of the aforementioned astrophysical plasmas.

Graphical abstract

References

  1. 1.
    M. Mehdipour, J.S. Kaastra, A.J.J. Raassen, A&A 579, A87 (2015) ADSCrossRefGoogle Scholar
  2. 2.
    S.N. Nahar, A&A 389, 716 (2002) ADSCrossRefGoogle Scholar
  3. 3.
    N.S. Schulz, C.R. Canizares, D. Huenemoerder, J.C. Lee, Astrophys. J. Lett. 545, L135 (2000) ADSCrossRefGoogle Scholar
  4. 4.
    T. Boehly, D. McCoy, M. Russotto, J. Wang, B. Yaakobi, Proceedings of the Ninth International Workshop on Laser Interaction and Related Plasma Phenomena, edited by H. Hora, G.H. Miley (Springer Science+Business Media, New York, 1991), Vol. 9, p. 185 Google Scholar
  5. 5.
    G. Schaumann, M.S. Schollmeier, G. Rodriguez-Prieto, A. Blazevic, E. Brambrink, M. Geissel, S. Korostiy, P. Pirzadeh, M. Roth, F.B. Rosmej, A.Ya. Faenov, T.A. Pikuz, K. Tsigutkin, Y. Maron, N.A. Tahir, D.H.H. Hoffmann, Laser and Particle Beams 23, 503 (2005) ADSCrossRefGoogle Scholar
  6. 6.
    E. Silver, H. Schnopper, S. Bandler, N. Brickhouse, S. Murray, M. Barbera, E. Takacs, J.D. Gillaspy, J.V. Porto, I. Kink, Astrophys. J. 541, 495 (2000) ADSCrossRefGoogle Scholar
  7. 7.
    D.A. Schwartz, Int. J. Mod. Phys. D 13, 1239 (2004) ADSCrossRefGoogle Scholar
  8. 8.
    D.H. Lumb, Opt. Eng. 51, 011009 (2012) ADSCrossRefGoogle Scholar
  9. 9.
    D. Porquet, J. Dubau, N. Grosso, Space Sci. Rev. 157, 103 (2010) ADSCrossRefGoogle Scholar
  10. 10.
    A.H. Gabriel, C. Jordan, MNRAS 145, 241 (1969) ADSCrossRefGoogle Scholar
  11. 11.
    A.H. Gabriel, C. Jordan, Astrophys. J. 186, 327 (1973) ADSCrossRefGoogle Scholar
  12. 12.
    S. Morita, J. Fujita, J. Phys. Soc. Jpn 52, 1957 (1983) ADSCrossRefGoogle Scholar
  13. 13.
    J.E. Bailey, G.A. Rochau, R.C. Mancini, C.A. Iglesias, J.J. MacFarlane, I.E. Golovkin, C. Blancard, Ph. Cosse, G. Faussurier, Phys. Plasma 16, 058101 (2009) ADSCrossRefGoogle Scholar
  14. 14.
    B. Edlén, Physica 13, 545 (1947) ADSCrossRefGoogle Scholar
  15. 15.
    B. Sylwester, J. Sylwester, K.J.H. Phillips, A&A 514, A82 (2010) ADSCrossRefGoogle Scholar
  16. 16.
    G. Fritz, R.W. Kreplin, J.F. Meekins, A.E. Unzicker, H. Friedman, Astrophys. J. Lett. 148, 133 (1967) ADSCrossRefGoogle Scholar
  17. 17.
    L.W. Acton, R.C. Catura, A.J. Meyerott, C.J. Wolfson, J.L. Culhane, Sol. Phys. 26, 183 (1972) ADSCrossRefGoogle Scholar
  18. 18.
    G.A. Doschek, U. Feldman, P.B. Landecker, D.L. McKenzie, Astrophys. J. 249, 372 (1981) ADSCrossRefGoogle Scholar
  19. 19.
    H.R. Griem, Astrophys. J. Lett. 156, 103 (1969) ADSCrossRefGoogle Scholar
  20. 20.
    D. Porquet, R. Mewe, J. Dubau, A.J.J. Raassen, J.S. Kaastra, A&A 376, 1113 (2001) ADSCrossRefGoogle Scholar
  21. 21.
    M.A. Bautista, T.R. Kallman, Astrophys. J. 544, 581 (2000) ADSCrossRefGoogle Scholar
  22. 22.
    R.L. Porter, G.J. Ferland, Astrophys. J. 664, 586 (2007) ADSCrossRefGoogle Scholar
  23. 23.
    R.K. Smith, N.S. Brickhouse, D.A. Liedahl, J.C. Raymond, Astrophys. J. Lett. 556, 91 (2001) ADSCrossRefGoogle Scholar
  24. 24.
    G.A. Doschek, J.F. Meekins, Sol. Phys. 13, 220 (1970) ADSCrossRefGoogle Scholar
  25. 25.
    C.J. Wolfson, J.W. Leibacher, J.G. Doyle, K.J.H. Phillips, Astrophys. J. 269, 319 (1983) ADSCrossRefGoogle Scholar
  26. 26.
    J.G. Doyle, F.P. Keenan, A&A 157, 116 (1986) ADSGoogle Scholar
  27. 27.
    F.P. Keenan, S.M. McCann, R. Barnsley, J. Dunn, K.D. Evans, Phys. Rev. A 39, 4092 (1989) ADSCrossRefGoogle Scholar
  28. 28.
    E. Källne, J. Källne, A.K. Pradhan, Phys. Rev. A 27, 1476 (1983) ADSCrossRefGoogle Scholar
  29. 29.
    M.S. Murillo, J.C. Weisheit, Phys. Rep. 302, 1 (1998) ADSCrossRefGoogle Scholar
  30. 30.
    D.R. Inglis, E. Teller, Astrophys. J. 90, 439 (1939) ADSCrossRefGoogle Scholar
  31. 31.
    R.P. Feynman, N. Metropolis, E. Teller, Phys. Rev. 75, 1561 (1949) ADSCrossRefGoogle Scholar
  32. 32.
    G. Ecker, W. Kröll, Phys. Fluids 6, 62 (1963) ADSCrossRefGoogle Scholar
  33. 33.
    J.C. Stewart, K.D. Pyatt Jr., Astrophys. J. 144, 1203 (1966) ADSCrossRefGoogle Scholar
  34. 34.
    O. Certk, P. Winkler, Int. J. Quant. Chem. 113 16 (2013) Google Scholar
  35. 35.
    J.S. Yoon, Y.D. Jung, Phys. Plasmas 3, 3291 (1996) ADSMathSciNetCrossRefGoogle Scholar
  36. 36.
    F.A. Gutierrez, J. Diaz-Valdes, J. Phys. B 27, 593 (1994) ADSCrossRefGoogle Scholar
  37. 37.
    M. Das, B.K. Sahoo, S. Pal, J. Phys. B 47, 175701 (2014) ADSCrossRefGoogle Scholar
  38. 38.
    M. Das, B.K. Sahoo, S. Pal, Phys. Rev. A 93, 052513 (2016) ADSCrossRefGoogle Scholar
  39. 39.
    D.K. Nandy, B.K. Sahoo, Phys. Rev. A 88, 052512 (2013) ADSCrossRefGoogle Scholar
  40. 40.
  41. 41.
    D.K. Nandy, Y. Singh, B.K. Sahoo, Phys. Rev. A 89, 062509 (2014) ADSCrossRefGoogle Scholar
  42. 42.
    B.K. Sahoo, Phys. Rev. A 93, 022503 (2016) ADSCrossRefGoogle Scholar
  43. 43.
    A.N. Artemyev, V.M. Shabaev, V.A. Yerokhin, G. Plunien, G. Soff, Phys. Rev. A 71, 062104 (2005) ADSCrossRefGoogle Scholar

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Atomic, Molecular and Optical Physics Division, Physical Research LaboratoryAhmedabadIndia
  2. 2.National Institute of Technology, Department of Physics and AstronomyOdishaIndia

Personalised recommendations