CROSS-SECTIONS AND RATE COEFFICIENTS FOR EXCITATION WITHIN THE 1S(2)2S(2)2P P-2 AND 1S(2)2S2P(24)P MULTIPLETS IN BORON-LIKE IONS C-II NI-XXIV BY HEAVY-PARTICLE IMPACT

Cross sections for excitation of the fine-structure transitions within the 1s(2)2s(2)2p P-2(o) and 1s(2)2s(2)p(2) P-4(e) multiplets in boron -like ions by proton, deuteron, triton, and ct-particle impact have be en calculated using a close-coupled impact-parameter method, which inc ludes the effects of dipole coupling to nearby configurations by means of a polarization potential. The ions considered are C II, N III, O I V, Ne VI, Mg VIII, Al IX, Si X, S XII, Ar XIV, Ca XVI, Ti XVII, 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 tempe ratures. (C) 1997 Academic Press.