Absolute Cross Sections for Near-Threshold Electron-Impact Excitation of the 2s2S→2p2P Transition of Li-Like C3+, N4+, and O5+ Ions
YANG Ning-Xuan1**, ZHANG Jian-Jun1, DONG Chen-Zhong2
1Key Laboratory of Ecophysics and Department of Physics, College of Science, Shihezi University, Shihezi 832000 2College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070
Abstract：Excitation cross sections of 1s22s2S1/2→1s22p2P1/2, 3/2 transition among the fine-structure levels in Li-like C3+, N4+, and O5+ ions are calculated for energies of the near-threshold by using the relativistic distorted-wave program REIE06. The target state wavefunctions are calculated by using the Grasp92 code. The continuum orbitals are studied in the distorted-wave approximation, in which the direct and exchange potentials among all the electrons are included. The results of the Li-like C3+ ion settle the discrepancy between several previous experiments by using the crossed-beams fluorescence method, in good agreement with the measurements of Savin et al. Moreover, the results in Li-like N4+, and O5+ ions are compared with the previous experiments, and a good agreement is obtained.
2014, Vol. 31 
