Atomic data from the IRON Project. XII. Electron excitation of forbidden transitions in V-like ions MN III, Fe IV, CO V and NI VI.
Electron excitation collision strengths for fine-structure transitions involving the four lowest 3d^5^ terms (^6^S, ^4^G, ^4^P, ^4^D) in vanadium-like ions Mn III, Fe IV, Co V and Ni VI are calculated using R-matrix techniques. All five sextet and quartet 3d^5^ target terms are included in the expansion of the total wavefunction. Fine-structure collision strengths are obtained from an algebraic transformation of the reactance matrices. These collision strengths are then averaged over a Maxwellian velocity distribution to obtain effective collision strengths as a function of electron temperature. To our knowledge, these are the first published data for these processes.
Astronomy and Astrophysics Supplement Series
- Pub Date:
- December 1995
- ATOMIC DATA