Electron impact excitation of Ca-like iron Fe6+

Details Electron impact excitation of Ca-like iron Fe6+ Electron impact excitation of Ca-like iron Fe6+

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.357..440z&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 357, Issue 2, pp. 440-448.

Astronomy and Astrophysics

Astronomy

6

Atomic Data, Atomic Processes

Scientific paper

Electron impact collision strengths, energy levels, oscillator strengths and spontaneous radiative decay rates are calculated for FeVII using the Flexible Atomic Code. The configuration interactions included in the calculations of atomic structure and excitation are among the configurations of ([Ne])3s23px3dy (x+y= 8, x= 6 - 3), 3s23p63dnl (n= 4, 5, l= 0, 1, ..., n- 1), 3s23p64l4l' (l, l'= 0, 1, 2, 3), 3s3px3dy (x+y= 9, x= 6, 5) and 3s23p53d24s. Collision strengths are calculated at 20 scattered electron energies (5-6000 eV) for the energetically lowest 340 levels, with the highest excited states corresponding to levels belonging to the configuration of 3s23p63d5g. Effective collision strengths are obtained by assuming a Maxwellian electron velocity distribution at 15 temperatures from 10 to 500 eV. Comparison has been made with earlier theoretical collision strengths for the transitions within the ground configuration 3s23p63d2, which are the only data available in the literature. Illustrative examples are given for some strong transitions belonging to the arrays of 3s23p63d2-3s23p53d3, 3s23p63d4p and 3s23p63d4f. The results show that the oscillator strengths and collision strengths are very sensitive to the configuration interaction. The complete data set is available electronically from http://www.astronomy.csbd.cn/EIE.

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