Electron-impact excitation of molybdenum from the (4d⁵5s)a⁷S ground state

Theoretical results from multi-state nonrelativistic R-matrix (close-coupling) calculations are presented for electron-impact excitation of molybdenum from the (4d⁵5s)⁷S ground state. The dependence of the results on the details of the theoretical model, particularly on the structure description and the number of coupled states, is analysed. These results represent the first step in an ongoing programme to obtain atomic data for spectroscopic modelling of a molybdenum-oxide lamp displaying strong transitions of Mo I.