Fine and hyperfine structure of the Li/sup -/ spectrum
1984
The fine and hyperfine structures of the doubly excited, quintet states of the /sup 7/Li/sup -/ ion are of comparable magnitude. This leads to strong second-order hyperfine corrections and to significant distortion of the Lande interval rule. We discuss the results of our many-body calculations in this system, and also in the analogous lithium quartet systems for which experimental data exist. We find that the hyperfine matrix elements of these few-electron systems may be adequately computed without detailed consideration of the electron correlations. Fine structure is significantly affected by such correlations. Experimental verification of the Li/sup -/ structure is underway.
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