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By Allison S. K., Duane W.

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The writer has loved and benefitted from longstanding collaboration with
T. P. Blach, N. C. Gallego, C. I. Contescu, M. Mastalerz, J. R. Morris, A. P. Radlinski,
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offering priceless reviews. the help of Renee´ Manning and Genevieve
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Extra info for Absorption Measurements of Certain Changes in the Average Wave-Length of Tertiary X-Rays

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One observes one peak for the 1s spectrum and two peaks for the 2s and 3s spectra. The reason for the two peaks is the 2s3d and 3s3d exchange interactions, which are directly related to the Slater-Condon parameters of respectively 5 and 13 eV. e. approximately half the respective Slater-Condon parameter. The experimental 1s X-ray absorption spectrum of NiO looks completely different than this single peak, showing essentially an edge jump and transitions from the 1s core state to all empty states of p character.

The 3F term symbol has lowest energy and is the ground state of a 3d2 system. This is in agreement with Hund's rules, which will be discussed in the next section. 5 eV above the ground state. 4 eV above the ground state, the reason being that two electrons in the same orbit strongly repel each other. Table 6 gives three related notations that are used to indicate the radial integrals. The Slater-Condon parameters Fk, the normalized Slater-Condon parameters F k and the Racah parameters A, B and C.

Column 3 gives the respective symmetries of these states in Oh symmetry and column 4 in D4h symmetry. In both cases the spin-orbit coupling has not yet been included. The Hund's rule ground state is given in boldface. 8 eV 1 Symmetries in D4h 1 A1 3 T1 E + 1T2 1 3 3 A2 + 3T1 + 3T2 1 A1 + 1T1 + 1T2 + 1E 1 A1 E + 3A 2 A1 + 1B1 + 1E + 1B2 B1 + 3E + 3A2 + 3E + 3B2 A1 + 1E + 1A2 + 1E + 1B2 + 1A1 + 1B1 At higher crystal field strengths states start to change their order and they cross. If states actually cross each other or show non-crossing behaviour if their symmetries allow a linear combination of states to be formed.

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Absorption Measurements of Certain Changes in the Average Wave-Length of Tertiary X-Rays by Allison S. K., Duane W.

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