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Collision Strengths for Electron Excitation of Coronal Ions

Published online by Cambridge University Press:  30 March 2016

D. R. Flower
D. R. Flower*
Affiliation:
Dept. of Physics, University College London, England

Extract

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Using general purpose computer programmes developed by Drs. Eissner and Nussbaumer at University College London for the solution of atomic structure and atomic collision problems, collision strengths have been obtained for transitions between terms of the ground and first few excited configurations of ions of interest in studies of the solar corona. The atomic structure programme is written in a configuration interaction representation and uses a scaled Thomas-Fermi potential as described by Eissner and Nussbaumer (1969). The bound state wave functions generated by the structure programme are used by the collision programme (Eissner, 1970) to calculate the R-matrix solution of the collision problem by means of the distorted wave approximation (Saraph et al., 1969). This approximation should be valid for highly ionized ions such as exist in the corona and this prediction is fully confirmed where comparison can be made with calculations using the more rigorous but more time-consuming close coupling method (Burke et al., 1966; Petrini, 1969).

Type
III. Joint Discussions
Information
Highlights of Astronomy , Volume 2: Highlights of Astronomy. As presented at the XIVth General Assembly of the IAU, 1970 , 1971 , pp. 512 - 517
Copyright
Copyright © Reidel 1971

References

Bely, O.: 1966a, Ann. Astrophys. 29, 131.Google Scholar
Bely, O.: 1966b, Ann. Astrophys. 29, 683.Google Scholar
Bely, O. and Blaha, M.: 1968, Solar Phys. 3, 563.Google Scholar
Bely, O. and Petrini, D.: 1970, Astron. Astrophys. 6, 318.Google Scholar
Burke, P. G., Tait, J. H., and Lewis, B. A.: 1966, Proc. Phys. Soc. 87, 209.Google Scholar
Eissner, W.: 1970, to be published.Google Scholar
Eissner, W. and Nussbaumer, H.: 1969, J. Phys. B. [2], 2, 1028.Google Scholar
Jones, M.: 1970, J. Phys. B. 3, 1571.Google Scholar
Petrini, D.: 1969, Astron. Astrophys. 1, 139.Google Scholar
Saraph, H. E., Seaton, M. J., and Shemming, J.: 1969, Phil. Trans. Roy. Soc. London A264, 77.Google Scholar