Question
What are Racah parameters? What do they signify? The gas-phase ion V3+ has a 3F ground
term. The 1D and 3P terms lie, respectively, 10,642 and 12,920 cm-1 above it. The energies of
the terms are given in terms of Racah parameters as E(
3F) = A=8B, E(
3P)=A+7B, E(
1D) =
A-3B+2C. Calculate the values of B and C for V
3+
Answer :
Word Count : 414
Racah parameters are quantitative measures used to describe the interelectronic repulsion in atoms and ions, particularly those containing partially filled d- or f-subshells. They are represented by the parameters A, B and C. These parameters arise from the electrostatic interactions between electrons and are useful in describing the energies of different electronic terms of a free ion. The Racah parameter A represents the average electrostatic energy of the electron configuration. Since A contributes approximately equally to all terms arising from the same ______ ___ _________ _______ ___ __________.
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Racah parameters are quantitative measures used to describe the interelectronic repulsion in atoms and ions, particularly those containing partially filled d- or f-subshells. They are represented by the parameters A, B and C. These parameters arise from the electrostatic interactions between electrons and are useful in describing the energies of different electronic terms of a free ion. The Racah parameter A represents the average electrostatic energy of the electron configuration. Since A contributes approximately equally to all terms arising from the same ______ ___ _________ _______ ___ __________.
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