The article reports electron-impact excitation cross-sections and rate coefficients for neutral tungsten for three transitions (400.87, 429.46, and 430.21 nm) using the relativistic distorted wave approach within the flexible atomic code. Some of these lines are also observed in tokamak plasma. Cross-sections are computed for incident electron energy up to 30 keV. The energy levels in flexible atomic code were corrected to match the NIST database. The electron impact excitation rate coefficients are also provided.
Dey et al. (Thu,) studied this question.