Parameters effective electrostatic

On the whole, the electrostatic interaction, real and two-electron effective, is described by a number of parameters (21 + 1) which equals the number of terms of the / configuration. This means that on including the two-electron effective electrostatic interaction in the calculations... 

In a semiempirical treatment, the effects of the effective electrostatic interactions described by P s with even values of t are absorbed by the real Slater parameters. 

For the three-electron effective electrostatic interaction, Judd (1966) has constructed the six-parameter expression... 

The two-electron effective electrostatic interaction in f configurations The coefficients of the two-electron effective parameters E, and listed... 

Z.B. Goldschmidt (1968a) recalculated the energy levels of this configuration with the additional effective electrostatic term 12G(G2)y. The term QjS could not be included in this calculation since the matrix elements of Q differ from zero only for the missing term S. The mean error reduced to 34 cm". In order to determine the importance of the effective electrostatic interactions Goldschmidt also carried out a calculation in which a and y were fixed on zero values. The mean error increased to 264 cm". The values obtained for the parameters in the various... 

Z.H. Goldschmidt (1966) recalculated the energy levels of Prill 4f, including, in addition to all parameters mentioned above, also the parameter j8t and the effective electrostatic three-electron pmameters T (i = 2, 3, 4, 6, 7, 8) introduced by Judd (1966). The mean error reduced to 37 cm". ... 

This last operator was later on augmented to the operator representing the complete two-electron 4f-5d effective electrostatic interaction, as given in formulae 1.151-1.153 and in table 1.12. As seen from the table, the effective electrostatic interaction in this case is described by the four effective Slater parameters F , F , G G. ... 

On including the effective electrostatic interaction in the energy-level calculations of this configuration, the mean error reduced to 0.5 cm, as compared to 10 cm" obtained in the conventional calculations including Hi + Hr only. The values obtained for the parameters describing the relevant interactions are (Crosswhite, 1971) ... 

Interaction constants for Ru" " (and for Rh" " and Pd" ") The details of parametric interpretations have not been published for these ions, but Shadmi [1] reported that 342 observed levels of (4d+5s) configurations of the Pd II group ions had been interpreted with a mean error of 83 cmif effective electrostatic parameters are limited to the a term, and 75 cm if the P and T parameters are introduced, the latter one being of negligible influence (a, P two-particle interactions, T interaction with configurations involving 4s open subshell). 

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