Abstract
650 levels belonging to the configurations (3d + 4s)n of all second spectra of the iron group were calculated, and 472 observed levels were fitted to them. In addition to the usually used approximation, a complete set of two-body and three-body effective-interaction parameters between 3d electrons was also introduced. Using only two-body effective interactions, we obtained a mean error of ±192 cm−1; while the addition of three-body effective interactions reduced the mean error to ±87 cm−1.
© 1968 Optical Society of America
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