Number of duplicates found in NIST and VALD-based repositories.
|Repository||Initial matches||Final matches|
Notes. Initial matches are based purely on identical upper and lower configurations and upper and lower J-values for a given ion. The literature checked matches have been cleaned of potential hyperfine, isotopic, and forbidden E2–M1-pair transitions. (a) All NIST duplicates are lines with either an undesignated upper or lower energy level and so we cannot conclude they are duplicate transitions.
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