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Comparison of Mg V (or Mg4+) effective collision strengths between our work (PW), Tayal & Sossah (2015, T15), Wang et al. (2017, W17), and composite data as incorporated in the CHIANTI atomic database v10.0.1 (C-1001) for the selected transitions listed in Table 3. The vertical dashed lines indicate the temperature threshold (T ~ 105 K) below which R-matrix data from Butler & Zeippen (1994) were used in CHIANTI, while at higher temperatures, DW data from Bhatia et al. (2006) were used.
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