J. Phys. IV France
Volume 11, Numéro PR2, Juillet 2001
X-Ray Lasers 2000
Page(s) Pr2-309 - Pr2-312
7th International Conference on X-Ray Lasers

J. Phys. IV France 11 (2001) Pr2-309-Pr2-312

DOI: 10.1051/jp4:2001259

Electron impact excitation of Al XIII : Collision strengths and rate coefficients

K.M. Aggarwal1, F.P. Keenan1 and S.J. Rose2

1  Department of Pure and Applied Physics, The Queen's University of Belfast, Balfast BT7 1NN, Northern Ireland
2  Plasma Physics Group, Rutherford Appleton Laboratory, Oxon OX11 0QX, U.K.

Collision strengths for transitions among the n = 5 levels of Al XIII have been computed in the LS coupling scheme using the R-matrix code. All partial waves with angular momentum [MATH] have been included, and resonances have been resolved in a fine energy grid in the threshold region. Collision strengths have been computed at energies below 220.0 Ryd, and effective collision strengths, obtained after integrating the collision strengths over a Maxwellian distribution of electron velocities, are calculated over a wide temperature range of [MATH].

© EDP Sciences 2001