CROSS SECTIONS AND RATE COEFFICIENTS FOR EXCITATION WITHIN THE 1s22s22p2PAND 1s22s2p2 4PMULTIPLETS IN BORON-LIKE IONS C II–Ni XXIV BY HEAVY PARTICLE IMPACT

Abstract

Cross sections for excitation of the fine-structure transitions within the 1s22s22p2Poand 1s22s2p2 4Pemultiplets in boron-like ions by proton, deuteron, triton, and α-particle impact have been calculated using a close-coupled impact-parameter method, which includes the effects of dipole coupling to nearby configurations by means of a polarization potential. The ions considered are C II, N III, O IV, Ne VI, Mg VIII, Al IX, Si X, S XII, Ar XIV, Ca XVI, Ti XVIII, Cr XX, Mn XXI, Fe XXII, Co XXIII, and Ni XXIV. Excitation rate coefficients have been calculated from the cross sections for a wide range of temperatures.