Highly nonlinear, sign-varying shift of hydrogen spectral lines in dense plasmas

A. Escarguel; E. Oks; J. Richou; D. Volodko

doi:10.1103/PhysRevE.62.2667

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Highly nonlinear, sign-varying shift of hydrogen spectral lines in dense plasmas

A. Escarguel¹, E. Oks², J. Richou¹, and D. Volodko²

¹Laboratoire d’Optique Appliquée, Université de Toulon, BP 132, 83957 La Garde Cedex, France
²Physics Department, Auburn University, Auburn, Alabama 36849-5311

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Phys. Rev. E 62, 2667 – Published 1 August, 2000

DOI: https://doi.org/10.1103/PhysRevE.62.2667

Abstract

Hydrogen $H_{α}$ shift is measured in a plasma characterized by a noticeable coupling due to a high electron density ${(N}_{e} >~ 2 \times 10^{18} {cm}^{- 3})$ and a relatively low temperature $(T = 8900 K) .$ The plasma is produced by a single laser breakdown in an underwater medium, creating a stable and radially homogeneous plasma. The results cannot be explained by the known contributions to the shift, which predict shifts by a factor of 2 greater than the experimental shifts. A contribution called dipole ionic-electronic shift (DIES) is introduced. The data presented in this work constitute the experimental discovery of this phenomenon. Indeed, the total theoretical shifts obtained taking into account the DIES are in excellent agreement with our experimental values.

References (15)

A. Escarguel, B. Ferhat, A. Lesage, and J. Richou, J. Quant. Spectrosc. Radiat. Transf. 64, 353 (2000); A. Escarguel, A. Lesage, and J. Richou, in 14th International Conference Spectral Line Shapes, State College, Pennsylvania, 1998, edited by R. M. Herman, AIP Conf. Proc. No. 467 (AIP Press, New York, 1999), p. 185; A. Escarguel, Ph.D. thesis, Universite de Provence, France, 1998.
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E. Oks, J. Quant. Spectrosc. Radiat. Transf. 65, 405 (2000); in 14th International Conference Spectral Line Shapes, State College, Pennsylvania, 1998, edited by R. M. Herman, AIP Conf. Proc. No. 467 (AIP Press, New York, 1999), p. 123.
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Ya. Ispolatov and E. Oks, J. Quant. Spectrosc. Radiat. Transf. 51, 129 (1994).
J. Touma, E. Oks, S. Alexiou, and A. Derevianko, J. Quant. Spectrosc. Radiat. Transf. 65, 543 (2000); E. Oks and J. Touma, 14th International Conference Spectral Line Shapes, State College, Pennsylvania, 1998, edited by R. M. Herman, AIP Conf. Proc. No. 467 (AIP Press, New York, 1999), p. 150.
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[c1] A. Escarguel, B. Ferhat, A. Lesage, and J. Richou, J. Quant. Spectrosc. Radiat. Transf. 64, 353 (2000); A. Escarguel, A. Lesage, and J. Richou, in 14th International Conference Spectral Line Shapes, State College, Pennsylvania, 1998, edited by R. M. Herman, AIP Conf. Proc. No. 467 (AIP Press, New York, 1999), p. 185; A. Escarguel, Ph.D. thesis, Universite de Provence, France, 1998.

[c2] H. R. Griem, Phys. Rev. A 38, 2943 (1988).

[c3] A. Könies and S. Günter, J. Quant. Spectrosc. Radiat. Transf. 52, 825 (1994).

[c4] E. Oks, J. Quant. Spectrosc. Radiat. Transf. 58, 821 (1997).

[c5] E. Oks, J. Quant. Spectrosc. Radiat. Transf. 65, 405 (2000); in 14th International Conference Spectral Line Shapes, State College, Pennsylvania, 1998, edited by R. M. Herman, AIP Conf. Proc. No. 467 (AIP Press, New York, 1999), p. 123.

[c6] P. Kepple and H. R. Griem, Phys. Rev. 173, 317 (1968).

[c7] G. V. Sholin, A. V. Demura, and V. S. Lisitsa, Zh. Eksp. Teor. Fiz. 64, 2097 (1973) [Sov. Phys. JETP 37, 1057 (1973)].

[c8] Ya. Ispolatov and E. Oks, J. Quant. Spectrosc. Radiat. Transf. 51, 129 (1994).

[c9] J. Touma, E. Oks, S. Alexiou, and A. Derevianko, J. Quant. Spectrosc. Radiat. Transf. 65, 543 (2000); E. Oks and J. Touma, 14th International Conference Spectral Line Shapes, State College, Pennsylvania, 1998, edited by R. M. Herman, AIP Conf. Proc. No. 467 (AIP Press, New York, 1999), p. 150.

[c10] R. Redon, Ph.D. thesis, Toulon University, France, 1997.

[c11] R. Redon, B. Ferhat, and J. Richou, J. Quant. Spectrosc. Radiat. Transf. 58, 151 (1997).

[c12] H. R. Griem, Plasma Spectroscopy (Academic, New York, 1964).

[c13] F. E. Irons, J. Quant. Spectrosc. Radiat. Transf. 22, 1 (1979).

[c14] St. Böddeker, S. Günter, A. Könies, L. Hitzschke, and H.-J. Kunze, Phys. Rev. E 47, 2785 (1993).

[c15] J. Puric, J. Labat, L. Cirkovic, I. Lakicevic, and S. Djenize, J. Phys. B 10, 2375 (1977).

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Highly nonlinear, sign-varying shift of hydrogen spectral lines in dense plasmas

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