CROSS SECTIONS AND RATE COEFFICIENTS FOR EXCITATION OF THE 1s22s22p23PJ → 1s22s22p23PJ′ FINE-STRUCTURE TRANSITIONS IN CARBON-LIKE IONS BY HEAVY PARTICLE IMPACT

Abstract

We have calculated cross sections for excitation of the fine-structure transitions in carbon-like ions by proton, deuteron, triton, and α-particle impact via a close-coupled impact-parameter method. This technique includes the effects of dipole coupling to the nearby triplet 2s2p3 configuration by means of a polarization potential. We consider the ions N II, O III, Ne V, Mg VII, Si IX, S XI, Ar XIII, Ca XV, Ti XVII, Cr XIX, Fe XXI, and Ni XXIII. Excitation rate coefficients have also been calculated for a range of temperatures.