Impact Polarization and Charge Exchange as Diagnostics of Proton Beams in Solar Flares

  • C. Balança
  • N. Feautrier
Part of the Astrophysics and Space Science Library book series (ASSL, volume 243)


The aim of this paper is to show how accurate cross sections allow to calculate the impact polarization of the Hα line in the case of excitation of chromospheric hydrogen atoms by proton beams accelerated during solar flares. The charge exchange and the direct excitation processes are strongly coupled. The double charge exchange is a new process which, when taken into account, leads to a 25% more polarization after the global balance.

Key words

polarization charge exchange close coupling scattering stars: sun flares methods: numerical 


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  1. Balança, C., Lin, C.D. and Feautrier, N.: 1998a, J. Phys. B: At. Mol. Opt. Phys., 31, 2321ADSCrossRefGoogle Scholar
  2. Balança, C. and Feautrier, N.: 1998b, Astron. Astrophys., 334, 1136ADSGoogle Scholar
  3. Detleffsen, D., Anton, M., Werner, A., Schartner, K.-H.: 1994, J. Phys. B: At. Mol. Opt. Phys., 27, 4195ADSCrossRefGoogle Scholar
  4. Donnelly, A., Geddes, J., Gilbody, H.B.: 1991, J. Phys. B: At. Mol. Phys., 24, 165ADSCrossRefGoogle Scholar
  5. Fang, C., Hénoux, J.-C., Hu Ju, Xue Yin-Zhang, Gao Xiu-Fa and Fu Qi-Jun: 1995a, Solar Physics, 157, 271ADSCrossRefGoogle Scholar
  6. Fang, C., Feautrier, N., Hénoux, J.-C.: 1995b, Astron. Astrophys., 297, 854ADSGoogle Scholar
  7. Fite, W.L., Smith, A.C. and Stebbings, R.F.: 1962, Proc. Roy. Soc. A, 268, 527ADSCrossRefGoogle Scholar
  8. Fritsch, W. and Lin, C.D.: 1982, J. Phys. B: At. Mol. Opt. Phys., 15, 1255ADSCrossRefGoogle Scholar
  9. Fritsch, W. and Lin, C.D.: 1983, Phys. Rev. A, 27, 3361ADSCrossRefGoogle Scholar
  10. Hénoux, J.-C., Chambe, G., Smith, D., Tamres, P., Rovira, M., Feautrier, N. and Sahal Bréchot, S.: 1990, Astrophys. J. Suppl., 73, 303ADSCrossRefGoogle Scholar
  11. Hénoux, J.-C. and Chambe, G.: 1990, JQSRT, 44, 193ADSCrossRefGoogle Scholar
  12. Hénoux, J.-C. and Vogt, E.: 1998, Physica Scripta, 78, 60CrossRefGoogle Scholar
  13. Park, J.T., Aldag, J.E., George, J.M. and Peacher, J.L.: 1976, Phys. Rev. A, 14, 608ADSCrossRefGoogle Scholar
  14. Vogt, E., Sahal-Bréchot, S., Hénoux, J.-C.: 1997, Astron. Astrophys., 324, 1211ADSGoogle Scholar
  15. Vogt, E. and Hénoux, J.-C.: 1999, in K.N. Nagendra, J.O. Stenflo (eds.), Solar Polarization, Proc. 2nd SPW, Kluwer, Dordrecht, (in this volume)Google Scholar
  16. Werner, A. and Schartner, K.-H.: 1996, J. Phys. B: At. Mol. Opt. Phys., 29, 125ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • C. Balança
    • 1
  • N. Feautrier
    • 1
  1. 1.DAMAP and URA 812 CNRSObservatoire de ParisMeudon CedexFrance

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