Phys. Rev. A 65, 032720 (2002) [5 pages]Resonant contributions to the electron-impact ionization of sodiumlike chromium
J. B. Qi, C. Y. Chen, Y. Zhao, H. N. Xia, and Y. S. Wang * Received 21 August 2001; published 26 February 2002 Electron-impact-ionization cross sections for Na-like Cr13+ have been calculated using semirelativistic distorted-wave Born-exchange approximation. We have included direct ionization, excitation autoionization, and resonant-excitation double-autoionization (REDA) processes in our calculation. The overall agreement between experimental data and our theoretical values is very good. Strong resonant peaks from REDA processes are found, and the REDA processes contribute about 50% and 25% to the average total ionization cross section between 570 and 650 eV and between 650 and 860 eV, respectively. A detailed investigation about the effects of radiative damping and loss channels on the REDA cross section has been carried out. The ionization-rate coefficients of Cr13+ are also presented. Besides, we have compared our calculated results of Fe15+ to experimental data and other theoretical values for examining the reliability of our calculations. ©2002 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevA.65.032720 * Corresponding author. Email address: yswang@fudan.edu.cn [ Abstract | Previous article | Next article | Issue 3 ] |
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